from __future__ import unicode_literals
from itertools import product
from distutils.version import LooseVersion
import numpy as np
import matplotlib as mpl
from matplotlib import cm
from matplotlib.collections import LineCollection
from matplotlib.dates import DateFormatter, date2num
mpl_version = LooseVersion(mpl.__version__)
import param
from ...core import OrderedDict, Dimension, Store
from ...core.util import match_spec, unique_iterator, basestring, max_range
from ...element import Points, Raster, Polygons, HeatMap
from ...operation import interpolate_curve
from ..util import compute_sizes, get_sideplot_ranges, get_min_distance
from .element import ElementPlot, ColorbarPlot, LegendPlot
from .path import PathPlot
from .plot import AdjoinedPlot, mpl_rc_context
class ChartPlot(ElementPlot):
show_legend = param.Boolean(default=True, doc="""
Whether to show legend for the plot.""")
[docs]class CurvePlot(ChartPlot):
"""
CurvePlot can plot Curve and ViewMaps of Curve, which can be
displayed as a single frame or animation. Axes, titles and legends
are automatically generated from dim_info.
If the dimension is set to cyclic in the dim_info it will rotate
the curve so that minimum y values are at the minimum x value to
make the plots easier to interpret.
"""
autotick = param.Boolean(default=False, doc="""
Whether to let matplotlib automatically compute tick marks
or to allow the user to control tick marks.""")
interpolation = param.ObjectSelector(objects=['linear', 'steps-mid',
'steps-pre', 'steps-post'],
default='linear', doc="""
Defines how the samples of the Curve are interpolated,
default is 'linear', other options include 'steps-mid',
'steps-pre' and 'steps-post'.""")
relative_labels = param.Boolean(default=False, doc="""
If plotted quantity is cyclic and center_cyclic is enabled,
will compute tick labels relative to the center.""")
show_grid = param.Boolean(default=False, doc="""
Enable axis grid.""")
show_legend = param.Boolean(default=True, doc="""
Whether to show legend for the plot.""")
style_opts = ['alpha', 'color', 'visible', 'linewidth', 'linestyle', 'marker', 'ms']
_plot_methods = dict(single='plot')
def get_data(self, element, ranges, style):
if 'steps' in self.interpolation:
element = interpolate_curve(element, interpolation=self.interpolation)
xs = element.dimension_values(0)
ys = element.dimension_values(1)
dims = element.dimensions()
if xs.dtype.kind == 'M':
dt_format = Dimension.type_formatters[np.datetime64]
dims[0] = dims[0](value_format=DateFormatter(dt_format))
coords = (ys, xs) if self.invert_axes else (xs, ys)
return coords, style, {'dimensions': dims}
def init_artists(self, ax, plot_args, plot_kwargs):
xs, ys = plot_args
if xs.dtype.kind == 'M':
artist = ax.plot_date(xs, ys, '-', **plot_kwargs)[0]
else:
artist = ax.plot(xs, ys, **plot_kwargs)[0]
return {'artist': artist}
def update_handles(self, key, axis, element, ranges, style):
artist = self.handles['artist']
(xs, ys), style, axis_kwargs = self.get_data(element, ranges, style)
artist.set_xdata(xs)
artist.set_ydata(ys)
return axis_kwargs
[docs]class ErrorPlot(ChartPlot):
"""
ErrorPlot plots the ErrorBar Element type and supporting
both horizontal and vertical error bars via the 'horizontal'
plot option.
"""
style_opts = ['ecolor', 'elinewidth', 'capsize', 'capthick',
'barsabove', 'lolims', 'uplims', 'xlolims',
'errorevery', 'xuplims', 'alpha', 'linestyle',
'linewidth', 'markeredgecolor', 'markeredgewidth',
'markerfacecolor', 'markersize', 'solid_capstyle',
'solid_joinstyle', 'dashes', 'color']
_plot_methods = dict(single='errorbar')
def init_artists(self, ax, plot_data, plot_kwargs):
handles = ax.errorbar(*plot_data, **plot_kwargs)
bottoms, tops = None, None
if mpl_version >= str('2.0'):
_, caps, verts = handles
if caps:
bottoms, tops = caps
else:
_, (bottoms, tops), verts = handles
return {'bottoms': bottoms, 'tops': tops, 'verts': verts[0]}
def get_data(self, element, ranges, style):
style['fmt'] = 'none'
dims = element.dimensions()
xs, ys = (element.dimension_values(i) for i in range(2))
yerr = element.array(dimensions=dims[2:4])
if self.invert_axes:
coords = (ys, xs)
err_key = 'xerr'
else:
coords = (xs, ys)
err_key = 'yerr'
style[err_key] = yerr.T if len(dims) > 3 else yerr[:, 0]
return coords, style, {}
def update_handles(self, key, axis, element, ranges, style):
bottoms = self.handles['bottoms']
tops = self.handles['tops']
verts = self.handles['verts']
_, style, axis_kwargs = self.get_data(element, ranges, style)
xs, ys, neg_error = (element.dimension_values(i) for i in range(3))
samples = len(xs)
pos_error = element.dimension_values(3) if len(element.dimensions()) > 3 else neg_error
if self.invert_axes:
bxs, bys = ys - neg_error, xs
txs, tys = ys + pos_error, xs
new_arrays = [np.array([[bxs[i], xs[i]], [txs[i], xs[i]]])
for i in range(samples)]
else:
bxs, bys = xs, ys - neg_error
txs, tys = xs, ys + pos_error
new_arrays = [np.array([[xs[i], bys[i]], [xs[i], tys[i]]])
for i in range(samples)]
verts.set_paths(new_arrays)
if bottoms:
bottoms.set_xdata(bxs)
bottoms.set_ydata(bys)
if tops:
tops.set_xdata(txs)
tops.set_ydata(tys)
return axis_kwargs
class AreaPlot(ChartPlot):
show_legend = param.Boolean(default=False, doc="""
Whether to show legend for the plot.""")
style_opts = ['color', 'facecolor', 'alpha', 'edgecolor', 'linewidth',
'hatch', 'linestyle', 'joinstyle',
'fill', 'capstyle', 'interpolate']
_plot_methods = dict(single='fill_between')
def get_data(self, element, ranges, style):
xs = element.dimension_values(0)
ys = [element.dimension_values(vdim) for vdim in element.vdims]
return tuple([xs]+ys), style, {}
def init_artists(self, ax, plot_data, plot_kwargs):
fill_fn = ax.fill_betweenx if self.invert_axes else ax.fill_between
stack = fill_fn(*plot_data, **plot_kwargs)
return {'artist': stack}
def get_extents(self, element, ranges):
vdims = element.vdims
vdim = vdims[0].name
ranges[vdim] = max_range([ranges[vd.name] for vd in vdims])
return super(AreaPlot, self).get_extents(element, ranges)
[docs]class SpreadPlot(AreaPlot):
"""
SpreadPlot plots the Spread Element type.
"""
show_legend = param.Boolean(default=False, doc="""
Whether to show legend for the plot.""")
def __init__(self, element, **params):
super(SpreadPlot, self).__init__(element, **params)
def get_data(self, element, ranges, style):
xs = element.dimension_values(0)
mean = element.dimension_values(1)
neg_error = element.dimension_values(2)
pos_idx = 3 if len(element.dimensions()) > 3 else 2
pos_error = element.dimension_values(pos_idx)
return (xs, mean-neg_error, mean+pos_error), style, {}
def get_extents(self, element, ranges):
return ChartPlot.get_extents(self, element, ranges)
[docs]class HistogramPlot(ChartPlot):
"""
HistogramPlot can plot DataHistograms and ViewMaps of
DataHistograms, which can be displayed as a single frame or
animation.
"""
style_opts = ['alpha', 'color', 'align', 'visible', 'facecolor',
'edgecolor', 'log', 'capsize', 'error_kw', 'hatch',
'linewidth']
def __init__(self, histograms, **params):
self.center = False
self.cyclic = False
super(HistogramPlot, self).__init__(histograms, **params)
if self.invert_axes:
self.axis_settings = ['ylabel', 'xlabel', 'yticks']
else:
self.axis_settings = ['xlabel', 'ylabel', 'xticks']
val_dim = self.hmap.last.get_dimension(1)
self.cyclic_range = val_dim.range if val_dim.cyclic else None
@mpl_rc_context
def initialize_plot(self, ranges=None):
hist = self.hmap.last
key = self.keys[-1]
ranges = self.compute_ranges(self.hmap, key, ranges)
el_ranges = match_spec(hist, ranges)
# Get plot ranges and values
edges, hvals, widths, lims = self._process_hist(hist)
style = self.style[self.cyclic_index]
if self.invert_axes:
self.offset_linefn = self.handles['axis'].axvline
self.plotfn = self.handles['axis'].barh
else:
self.offset_linefn = self.handles['axis'].axhline
self.plotfn = self.handles['axis'].bar
# Plot bars and make any adjustments
legend = hist.label if self.show_legend else ''
bars = self.plotfn(edges, hvals, widths, zorder=self.zorder, label=legend, align='edge', **style)
self.handles['artist'] = self._update_plot(self.keys[-1], hist, bars, lims, ranges) # Indexing top
ticks = self._compute_ticks(hist, edges, widths, lims)
ax_settings = self._process_axsettings(hist, lims, ticks)
return self._finalize_axis(self.keys[-1], ranges=el_ranges, element=hist, **ax_settings)
def _process_hist(self, hist):
"""
Get data from histogram, including bin_ranges and values.
"""
self.cyclic = hist.get_dimension(0).cyclic
edges = hist.edges[:-1]
hist_vals = np.array(hist.values)
widths = np.diff(hist.edges)
lims = hist.range(0) + hist.range(1)
return edges, hist_vals, widths, lims
def _compute_ticks(self, element, edges, widths, lims):
"""
Compute the ticks either as cyclic values in degrees or as roughly
evenly spaced bin centers.
"""
if self.xticks is None or not isinstance(self.xticks, int):
return None
if self.cyclic:
x0, x1, _, _ = lims
xvals = np.linspace(x0, x1, self.xticks)
labels = ["%.0f" % np.rad2deg(x) + '\N{DEGREE SIGN}' for x in xvals]
elif self.xticks:
dim = element.get_dimension(0)
inds = np.linspace(0, len(edges), self.xticks, dtype=np.int)
edges = list(edges) + [edges[-1] + widths[-1]]
xvals = [edges[i] for i in inds]
labels = [dim.pprint_value(v) for v in xvals]
return [xvals, labels]
def get_extents(self, element, ranges):
x0, y0, x1, y1 = super(HistogramPlot, self).get_extents(element, ranges)
ylow, yhigh = element.get_dimension(1).range
y0 = np.nanmin([0, y0]) if ylow is None or not np.isfinite(ylow) else ylow
y1 = np.nanmax([0, y1]) if yhigh is None or not np.isfinite(yhigh) else yhigh
return (x0, y0, x1, y1)
def _process_axsettings(self, hist, lims, ticks):
"""
Get axis settings options including ticks, x- and y-labels
and limits.
"""
axis_settings = dict(zip(self.axis_settings, [None, None, (None if self.overlaid else ticks)]))
return axis_settings
def _update_plot(self, key, hist, bars, lims, ranges):
"""
Process bars can be subclassed to manually adjust bars
after being plotted.
"""
return bars
def _update_artists(self, key, hist, edges, hvals, widths, lims, ranges):
"""
Update all the artists in the histogram. Subclassable to
allow updating of further artists.
"""
plot_vals = zip(self.handles['artist'], edges, hvals, widths)
for bar, edge, height, width in plot_vals:
if self.invert_axes:
bar.set_y(edge)
bar.set_width(height)
bar.set_height(width)
else:
bar.set_x(edge)
bar.set_height(height)
bar.set_width(width)
def update_handles(self, key, axis, element, ranges, style):
# Process values, axes and style
edges, hvals, widths, lims = self._process_hist(element)
ticks = self._compute_ticks(element, edges, widths, lims)
ax_settings = self._process_axsettings(element, lims, ticks)
self._update_artists(key, element, edges, hvals, widths, lims, ranges)
return ax_settings
class SideHistogramPlot(AdjoinedPlot, HistogramPlot):
bgcolor = param.Parameter(default=(1, 1, 1, 0), doc="""
Make plot background invisible.""")
offset = param.Number(default=0.2, bounds=(0,1), doc="""
Histogram value offset for a colorbar.""")
show_grid = param.Boolean(default=False, doc="""
Whether to overlay a grid on the axis.""")
def _process_hist(self, hist):
"""
Subclassed to offset histogram by defined amount.
"""
edges, hvals, widths, lims = super(SideHistogramPlot, self)._process_hist(hist)
offset = self.offset * lims[3]
hvals *= 1-self.offset
hvals += offset
lims = lims[0:3] + (lims[3] + offset,)
return edges, hvals, widths, lims
def _update_artists(self, n, element, edges, hvals, widths, lims, ranges):
super(SideHistogramPlot, self)._update_artists(n, element, edges, hvals, widths, lims, ranges)
self._update_plot(n, element, self.handles['artist'], lims, ranges)
def _update_plot(self, key, element, bars, lims, ranges):
"""
Process the bars and draw the offset line as necessary. If a
color map is set in the style of the 'main' ViewableElement object, color
the bars appropriately, respecting the required normalization
settings.
"""
main = self.adjoined.main
_, y1 = element.range(1)
offset = self.offset * y1
range_item, main_range, dim = get_sideplot_ranges(self, element, main, ranges)
# Check if plot is colormapped
plot_type = Store.registry['matplotlib'].get(type(range_item))
opts = self.lookup_options(range_item, 'plot')
if plot_type and issubclass(plot_type, ColorbarPlot):
cidx = opts.options.get('color_index', None)
cdim = None if cidx is None else range_item.get_dimension(cidx)
else:
cdim = None
# Get colormapping options
if isinstance(range_item, Raster) or cdim:
style = self.lookup_options(range_item, 'style')[self.cyclic_index]
cmap = cm.get_cmap(style.get('cmap'))
main_range = style.get('clims', main_range)
else:
cmap = None
if offset and ('offset_line' not in self.handles):
self.handles['offset_line'] = self.offset_linefn(offset,
linewidth=1.0,
color='k')
elif offset:
self._update_separator(offset)
if cmap is not None:
self._colorize_bars(cmap, bars, element, main_range, dim)
return bars
def _colorize_bars(self, cmap, bars, element, main_range, dim):
"""
Use the given cmap to color the bars, applying the correct
color ranges as necessary.
"""
cmap_range = main_range[1] - main_range[0]
lower_bound = main_range[0]
colors = np.array(element.dimension_values(dim))
colors = (colors - lower_bound) / (cmap_range)
for c, bar in zip(colors, bars):
bar.set_facecolor(cmap(c))
bar.set_clip_on(False)
def _update_separator(self, offset):
"""
Compute colorbar offset and update separator line
if map is non-zero.
"""
offset_line = self.handles['offset_line']
if offset == 0:
offset_line.set_visible(False)
else:
offset_line.set_visible(True)
if self.invert_axes:
offset_line.set_xdata(offset)
else:
offset_line.set_ydata(offset)
[docs]class PointPlot(ChartPlot, ColorbarPlot):
"""
Note that the 'cmap', 'vmin' and 'vmax' style arguments control
how point magnitudes are rendered to different colors.
"""
color_index = param.ClassSelector(default=None, class_=(basestring, int),
allow_None=True, doc="""
Index of the dimension from which the color will the drawn""")
size_index = param.ClassSelector(default=None, class_=(basestring, int),
allow_None=True, doc="""
Index of the dimension from which the sizes will the drawn.""")
scaling_method = param.ObjectSelector(default="area",
objects=["width", "area"],
doc="""
Determines whether the `scaling_factor` should be applied to
the width or area of each point (default: "area").""")
scaling_factor = param.Number(default=1, bounds=(0, None), doc="""
Scaling factor which is applied to either the width or area
of each point, depending on the value of `scaling_method`.""")
show_grid = param.Boolean(default=False, doc="""
Whether to draw grid lines at the tick positions.""")
size_fn = param.Callable(default=np.abs, doc="""
Function applied to size values before applying scaling,
to remove values lower than zero.""")
style_opts = ['alpha', 'color', 'edgecolors', 'facecolors',
'linewidth', 'marker', 'size', 'visible',
'cmap', 'vmin', 'vmax', 'norm']
_disabled_opts = ['size']
_plot_methods = dict(single='scatter')
def get_data(self, element, ranges, style):
xs, ys = (element.dimension_values(i) for i in range(2))
self._compute_styles(element, ranges, style)
return (ys, xs) if self.invert_axes else (xs, ys), style, {}
def _compute_styles(self, element, ranges, style):
cdim = element.get_dimension(self.color_index)
color = style.pop('color', None)
cmap = style.get('cmap', None)
if cdim and cmap:
cs = element.dimension_values(self.color_index)
# Check if numeric otherwise treat as categorical
if cs.dtype.kind in 'if':
style['c'] = cs
else:
categories = np.unique(cs)
xsorted = np.argsort(categories)
ypos = np.searchsorted(categories[xsorted], cs)
style['c'] = xsorted[ypos]
self._norm_kwargs(element, ranges, style, cdim)
elif color:
style['c'] = color
style['edgecolors'] = style.pop('edgecolors', style.pop('edgecolor', 'none'))
sdim = element.get_dimension(self.size_index)
if sdim:
sizes = element.dimension_values(self.size_index)
ms = style['s'] if 's' in style else mpl.rcParams['lines.markersize']
sizes = compute_sizes(sizes, self.size_fn, self.scaling_factor,
self.scaling_method, ms)
if sizes is None:
eltype = type(element).__name__
self.warning('%s dimension is not numeric, cannot '
'use to scale %s size.' % (sdim.pprint_label, eltype))
else:
style['s'] = sizes
style['edgecolors'] = style.pop('edgecolors', 'none')
def update_handles(self, key, axis, element, ranges, style):
paths = self.handles['artist']
(xs, ys), style, _ = self.get_data(element, ranges, style)
paths.set_offsets(np.column_stack([xs, ys]))
sdim = element.get_dimension(self.size_index)
if sdim:
paths.set_sizes(style['s'])
cdim = element.get_dimension(self.color_index)
if cdim:
paths.set_clim((style['vmin'], style['vmax']))
paths.set_array(style['c'])
if 'norm' in style:
paths.norm = style['norm']
[docs]class VectorFieldPlot(ColorbarPlot):
"""
Renders vector fields in sheet coordinates. The vectors are
expressed in polar coordinates and may be displayed according to
angle alone (with some common, arbitrary arrow length) or may be
true polar vectors.
The color or magnitude can be mapped onto any dimension using the
color_index and size_index.
The length of the arrows is controlled by the 'scale' style
option. The scaling of the arrows may also be controlled via the
normalize_lengths and rescale_lengths plot option, which will
normalize the lengths to a maximum of 1 and scale them according
to the minimum distance respectively.
"""
color_index = param.ClassSelector(default=None, class_=(basestring, int),
allow_None=True, doc="""
Index of the dimension from which the color will the drawn""")
size_index = param.ClassSelector(default=None, class_=(basestring, int),
allow_None=True, doc="""
Index of the dimension from which the sizes will the drawn.""")
arrow_heads = param.Boolean(default=True, doc="""
Whether or not to draw arrow heads. If arrowheads are enabled,
they may be customized with the 'headlength' and
'headaxislength' style options.""")
normalize_lengths = param.Boolean(default=True, doc="""
Whether to normalize vector magnitudes automatically. If False,
it will be assumed that the lengths have already been correctly
normalized.""")
rescale_lengths = param.Boolean(default=True, doc="""
Whether the lengths will be rescaled to take into account the
smallest non-zero distance between two vectors.""")
style_opts = ['alpha', 'color', 'edgecolors', 'facecolors',
'linewidth', 'marker', 'visible', 'cmap',
'scale', 'headlength', 'headaxislength', 'pivot',
'width','headwidth', 'norm']
_plot_methods = dict(single='quiver')
def __init__(self, *args, **params):
super(VectorFieldPlot, self).__init__(*args, **params)
self._min_dist = self._get_map_info(self.hmap)
def _get_map_info(self, vmap):
"""
Get the minimum sample distance and maximum magnitude
"""
return np.min([get_min_distance(vfield) for vfield in vmap])
def get_data(self, element, ranges, style):
input_scale = style.pop('scale', 1.0)
xidx, yidx = (1, 0) if self.invert_axes else (0, 1)
xs = element.dimension_values(xidx) if len(element.data) else []
ys = element.dimension_values(yidx) if len(element.data) else []
radians = element.dimension_values(2) if len(element.data) else []
if self.invert_axes: radians = radians+1.5*np.pi
angles = list(np.rad2deg(radians))
if self.rescale_lengths:
input_scale = input_scale / self._min_dist
mag_dim = element.get_dimension(self.size_index)
if mag_dim:
magnitudes = element.dimension_values(mag_dim)
_, max_magnitude = ranges[mag_dim.name]
if self.normalize_lengths and max_magnitude != 0:
magnitudes = magnitudes / max_magnitude
else:
magnitudes = np.ones(len(xs))
args = (xs, ys, magnitudes, [0.0] * len(element))
if self.color_index:
colors = element.dimension_values(self.color_index)
args += (colors,)
cdim = element.get_dimension(self.color_index)
self._norm_kwargs(element, ranges, style, cdim)
style['clim'] = (style.pop('vmin'), style.pop('vmax'))
style.pop('color', None)
if 'pivot' not in style: style['pivot'] = 'mid'
if not self.arrow_heads:
style['headaxislength'] = 0
style.update(dict(scale=input_scale, angles=angles,
units='x', scale_units='x'))
return args, style, {}
def update_handles(self, key, axis, element, ranges, style):
args, style, axis_kwargs = self.get_data(element, ranges, style)
# Set magnitudes, angles and colors if supplied.
quiver = self.handles['artist']
quiver.set_offsets(np.column_stack(args[:2]))
quiver.U = args[2]
quiver.angles = style['angles']
if self.color_index:
quiver.set_array(args[-1])
quiver.set_clim(style['clim'])
return axis_kwargs
class BarPlot(LegendPlot):
group_index = param.Integer(default=0, doc="""
Index of the dimension in the supplied Bars
Element, which will be laid out into groups.""")
category_index = param.Integer(default=1, doc="""
Index of the dimension in the supplied Bars
Element, which will be laid out into categories.""")
stack_index = param.Integer(default=2, doc="""
Index of the dimension in the supplied Bars
Element, which will stacked.""")
padding = param.Number(default=0.2, doc="""
Defines the padding between groups.""")
color_by = param.List(default=['category'], doc="""
Defines how the Bar elements colored. Valid options include
any permutation of 'group', 'category' and 'stack'.""")
show_legend = param.Boolean(default=True, doc="""
Whether to show legend for the plot.""")
xticks = param.Integer(0, precedence=-1)
style_opts = ['alpha', 'color', 'align', 'visible', 'edgecolor',
'log', 'facecolor', 'capsize', 'error_kw', 'hatch']
legend_specs = dict(LegendPlot.legend_specs, **{
'top': dict(bbox_to_anchor=(0., 1.02, 1., .102),
ncol=3, loc=3, mode="expand", borderaxespad=0.),
'bottom': dict(ncol=3, mode="expand", loc=2,
bbox_to_anchor=(0., -0.4, 1., .102),
borderaxespad=0.1)})
_dimensions = OrderedDict([('group', 0),
('category',1),
('stack',2)])
def __init__(self, element, **params):
super(BarPlot, self).__init__(element, **params)
self.values, self.bar_dimensions = self._get_values()
def _get_values(self):
"""
Get unique index value for each bar
"""
gi, ci, si =self.group_index, self.category_index, self.stack_index
ndims = self.hmap.last.ndims
dims = self.hmap.last.kdims
dimensions = []
values = {}
for vidx, vtype in zip([gi, ci, si], self._dimensions):
if vidx < ndims:
dim = dims[vidx]
dimensions.append(dim)
vals = self.hmap.dimension_values(dim.name)
else:
dimensions.append(None)
vals = [None]
values[vtype] = list(unique_iterator(vals))
return values, dimensions
def _compute_styles(self, element, style_groups):
"""
Computes color and hatch combinations by
any combination of the 'group', 'category'
and 'stack'.
"""
style = self.lookup_options(element, 'style')[0]
sopts = []
for sopt in ['color', 'hatch']:
if sopt in style:
sopts.append(sopt)
style.pop(sopt, None)
color_groups = []
for sg in style_groups:
color_groups.append(self.values[sg])
style_product = list(product(*color_groups))
wrapped_style = self.lookup_options(element, 'style').max_cycles(len(style_product))
color_groups = {k:tuple(wrapped_style[n][sopt] for sopt in sopts)
for n,k in enumerate(style_product)}
return style, color_groups, sopts
def get_extents(self, element, ranges):
ngroups = len(self.values['group'])
vdim = element.vdims[0].name
if self.stack_index in range(element.ndims):
return 0, 0, ngroups, np.NaN
else:
vrange = ranges[vdim]
return 0, np.nanmin([vrange[0], 0]), ngroups, vrange[1]
@mpl_rc_context
def initialize_plot(self, ranges=None):
element = self.hmap.last
vdim = element.vdims[0]
axis = self.handles['axis']
key = self.keys[-1]
ranges = self.compute_ranges(self.hmap, key, ranges)
ranges = match_spec(element, ranges)
self.handles['artist'], self.handles['xticks'], xdims = self._create_bars(axis, element)
return self._finalize_axis(key, ranges=ranges, xticks=self.handles['xticks'],
element=element, dimensions=[xdims, vdim])
def _finalize_ticks(self, axis, element, xticks, yticks, zticks):
"""
Apply ticks with appropriate offsets.
"""
yalignments = None
if xticks is not None:
ticks, labels, yalignments = zip(*sorted(xticks, key=lambda x: x[0]))
xticks = (list(ticks), list(labels))
super(BarPlot, self)._finalize_ticks(axis, element, xticks, yticks, zticks)
if yalignments:
for t, y in zip(axis.get_xticklabels(), yalignments):
t.set_y(y)
def _create_bars(self, axis, element):
# Get style and dimension information
values = self.values
gi, ci, si = self.group_index, self.category_index, self.stack_index
gdim, cdim, sdim = [element.kdims[i] if i < element.ndims else None
for i in (gi, ci, si) ]
indices = dict(zip(self._dimensions, (gi, ci, si)))
style_groups = [sg for sg in self.color_by if indices[sg] < element.ndims]
style_opts, color_groups, sopts = self._compute_styles(element, style_groups)
dims = element.dimensions('key', label=True)
ndims = len(dims)
xdims = [d for d in [cdim, gdim] if d is not None]
# Compute widths
width = (1-(2.*self.padding)) / len(values['category'])
# Initialize variables
xticks = []
val_key = [None] * ndims
style_key = [None] * len(style_groups)
label_key = [None] * len(style_groups)
labels = []
bars = {}
# Iterate over group, category and stack dimension values
# computing xticks and drawing bars and applying styles
for gidx, grp_name in enumerate(values['group']):
if grp_name is not None:
grp = gdim.pprint_value(grp_name)
if 'group' in style_groups:
idx = style_groups.index('group')
label_key[idx] = str(grp)
style_key[idx] = grp_name
val_key[gi] = grp_name
if ci < ndims:
yalign = -0.04
else:
yalign = 0
xticks.append((gidx+0.5, grp, yalign))
for cidx, cat_name in enumerate(values['category']):
xpos = gidx+self.padding+(cidx*width)
if cat_name is not None:
cat = gdim.pprint_value(cat_name)
if 'category' in style_groups:
idx = style_groups.index('category')
label_key[idx] = str(cat)
style_key[idx] = cat_name
val_key[ci] = cat_name
xticks.append((xpos+width/2., cat, 0))
prev = 0
for stk_name in values['stack']:
if stk_name is not None:
if 'stack' in style_groups:
idx = style_groups.index('stack')
stk = gdim.pprint_value(stk_name)
label_key[idx] = str(stk)
style_key[idx] = stk_name
val_key[si] = stk_name
vals = element.sample([tuple(val_key)]).dimension_values(element.vdims[0].name)
val = float(vals[0]) if len(vals) else np.NaN
label = ', '.join(label_key)
style = dict(style_opts, label='' if label in labels else label,
**dict(zip(sopts, color_groups[tuple(style_key)])))
bar = axis.bar([xpos], [val], width=width, bottom=prev,
**style)
# Update variables
bars[tuple(val_key)] = bar
prev += val if np.isfinite(val) else 0
labels.append(label)
title = [element.kdims[indices[cg]].pprint_label
for cg in self.color_by if indices[cg] < ndims]
if self.show_legend and any(len(l) for l in labels):
leg_spec = self.legend_specs[self.legend_position]
if self.legend_cols: leg_spec['ncol'] = self.legend_cols
axis.legend(title=', '.join(title), **leg_spec)
return bars, xticks, xdims
def update_handles(self, key, axis, element, ranges, style):
dims = element.dimensions('key', label=True)
ndims = len(dims)
ci, gi, si = self.category_index, self.group_index, self.stack_index
val_key = [None] * ndims
for g in self.values['group']:
if g is not None: val_key[gi] = g
for c in self.values['category']:
if c is not None: val_key[ci] = c
prev = 0
for s in self.values['stack']:
if s is not None: val_key[si] = s
bar = self.handles['artist'].get(tuple(val_key))
if bar:
vals = element.sample([tuple(val_key)]).dimension_values(element.vdims[0].name)
height = float(vals[0]) if len(vals) else np.NaN
bar[0].set_height(height)
bar[0].set_y(prev)
prev += height if np.isfinite(height) else 0
return {'xticks': self.handles['xticks']}
class SpikesPlot(PathPlot, ColorbarPlot):
aspect = param.Parameter(default='square', doc="""
The aspect ratio mode of the plot. Allows setting an
explicit aspect ratio as width/height as well as
'square' and 'equal' options.""")
color_index = param.ClassSelector(default=None, allow_None=True,
class_=(basestring, int), doc="""
Index of the dimension from which the color will the drawn""")
spike_length = param.Number(default=0.1, doc="""
The length of each spike if Spikes object is one dimensional.""")
position = param.Number(default=0., doc="""
The position of the lower end of each spike.""")
style_opts = PathPlot.style_opts + ['cmap']
def init_artists(self, ax, plot_args, plot_kwargs):
line_segments = LineCollection(*plot_args, **plot_kwargs)
ax.add_collection(line_segments)
return {'artist': line_segments}
def get_extents(self, element, ranges):
l, b, r, t = super(SpikesPlot, self).get_extents(element, ranges)
if len(element.dimensions()) == 1:
b, t = self.position, self.position+self.spike_length
else:
b = np.nanmin([0, b])
t = np.nanmax([0, t])
return l, b, r, t
def get_data(self, element, ranges, style):
dimensions = element.dimensions(label=True)
ndims = len(dimensions)
pos = self.position
if ndims > 1:
data = [[(x, pos), (x, pos+y)] for x, y in element.array()]
else:
height = self.spike_length
data = [[(x[0], pos), (x[0], pos+height)] for x in element.array()]
if self.invert_axes:
data = [(line[0][::-1], line[1][::-1]) for line in data]
dims = element.dimensions()
clean_spikes = []
for spike in data:
xs, ys = zip(*spike)
cols = []
for i, vs in enumerate((xs, ys)):
vs = np.array(vs)
if vs.dtype.kind == 'M' and i < len(dims):
dt_format = Dimension.type_formatters[np.datetime64]
dims[i] = dims[i](value_format=DateFormatter(dt_format))
vs = date2num([v.tolist() if isinstance(v, np.datetime64) else v for v in vs])
cols.append(vs)
clean_spikes.append(np.column_stack(cols))
cdim = element.get_dimension(self.color_index)
if cdim:
style['array'] = element.dimension_values(cdim)
self._norm_kwargs(element, ranges, style, cdim)
style['clim'] = style.pop('vmin'), style.pop('vmax')
return (clean_spikes,), style, {'dimensions': dims}
def update_handles(self, key, axis, element, ranges, style):
artist = self.handles['artist']
(data,), kwargs, axis_kwargs = self.get_data(element, ranges, style)
artist.set_paths(data)
artist.set_visible(style.get('visible', True))
if 'array' in kwargs:
artist.set_clim((kwargs['vmin'], kwargs['vmax']))
artist.set_array(kwargs['array'])
if 'norm' in kwargs:
artist.norm = kwargs['norm']
return axis_kwargs
class SideSpikesPlot(AdjoinedPlot, SpikesPlot):
bgcolor = param.Parameter(default=(1, 1, 1, 0), doc="""
Make plot background invisible.""")
border_size = param.Number(default=0, doc="""
The size of the border expressed as a fraction of the main plot.""")
subplot_size = param.Number(default=0.1, doc="""
The size subplots as expressed as a fraction of the main plot.""")
spike_length = param.Number(default=1, doc="""
The length of each spike if Spikes object is one dimensional.""")
xaxis = param.ObjectSelector(default='bare',
objects=['top', 'bottom', 'bare', 'top-bare',
'bottom-bare', None], doc="""
Whether and where to display the xaxis, bare options allow suppressing
all axis labels including ticks and xlabel. Valid options are 'top',
'bottom', 'bare', 'top-bare' and 'bottom-bare'.""")
yaxis = param.ObjectSelector(default='bare',
objects=['left', 'right', 'bare', 'left-bare',
'right-bare', None], doc="""
Whether and where to display the yaxis, bare options allow suppressing
all axis labels including ticks and ylabel. Valid options are 'left',
'right', 'bare' 'left-bare' and 'right-bare'.""")
[docs]class BoxPlot(ChartPlot):
"""
BoxPlot plots the ErrorBar Element type and supporting
both horizontal and vertical error bars via the 'horizontal'
plot option.
"""
style_opts = ['notch', 'sym', 'whis', 'bootstrap',
'conf_intervals', 'widths', 'showmeans',
'show_caps', 'showfliers', 'boxprops',
'whiskerprops', 'capprops', 'flierprops',
'medianprops', 'meanprops', 'meanline']
_plot_methods = dict(single='boxplot')
def get_extents(self, element, ranges):
return (np.NaN,)*4
def get_data(self, element, ranges, style):
groups = element.groupby(element.kdims)
data, labels = [], []
groups = groups.data.items() if element.kdims else [(element.label, element)]
for key, group in groups:
if element.kdims:
label = ','.join([d.pprint_value(v) for d, v in zip(element.kdims, key)])
else:
label = key
data.append(group[group.vdims[0]])
labels.append(label)
style['labels'] = labels
style = {k: v for k, v in style.items()
if k not in ['zorder', 'label']}
style['vert'] = not self.invert_axes
format_kdims = [kd(value_format=None) for kd in element.kdims]
return (data,), style, {'dimensions': [format_kdims,
element.vdims[0]]}
def teardown_handles(self):
for group in self.handles['artist'].values():
for v in group:
v.remove()
class SideBoxPlot(AdjoinedPlot, BoxPlot):
bgcolor = param.Parameter(default=(1, 1, 1, 0), doc="""
Make plot background invisible.""")
border_size = param.Number(default=0, doc="""
The size of the border expressed as a fraction of the main plot.""")
xaxis = param.ObjectSelector(default='bare',
objects=['top', 'bottom', 'bare', 'top-bare',
'bottom-bare', None], doc="""
Whether and where to display the xaxis, bare options allow suppressing
all axis labels including ticks and xlabel. Valid options are 'top',
'bottom', 'bare', 'top-bare' and 'bottom-bare'.""")
yaxis = param.ObjectSelector(default='bare',
objects=['left', 'right', 'bare', 'left-bare',
'right-bare', None], doc="""
Whether and where to display the yaxis, bare options allow suppressing
all axis labels including ticks and ylabel. Valid options are 'left',
'right', 'bare' 'left-bare' and 'right-bare'.""")
def __init__(self, *args, **kwargs):
super(SideBoxPlot, self).__init__(*args, **kwargs)
if self.adjoined:
self.invert_axes = not self.invert_axes
