Source code for holoviews.plotting.mpl.geometry

import numpy as np

from matplotlib.collections import LineCollection, PatchCollection
from matplotlib.patches import Rectangle

from ...core.options import abbreviated_exception
from ..mixins import GeomMixin
from .element import ColorbarPlot
from .path import PathPlot, PolygonPlot


[docs]class SegmentPlot(GeomMixin, ColorbarPlot): """ Segments are lines in 2D space where each two key dimensions specify a (x, y) node of the line. """ style_opts = PathPlot.style_opts + ['cmap'] _nonvectorized_styles = ['cmap'] _plot_methods = dict(single='segment')
[docs] def init_artists(self, ax, plot_args, plot_kwargs): if 'c' in plot_kwargs: plot_kwargs['array'] = plot_kwargs.pop('c') if 'vmin' in plot_kwargs and 'vmax' in plot_kwargs: plot_kwargs['clim'] = plot_kwargs.pop('vmin'), plot_kwargs.pop('vmax') if not 'array' in plot_kwargs and 'cmap' in plot_kwargs: del plot_kwargs['cmap'] line_segments = LineCollection(*plot_args, **plot_kwargs) ax.add_collection(line_segments) return {'artist': line_segments}
def get_data(self, element, ranges, style): inds = (1, 0, 3, 2) if self.invert_axes else (0, 1, 2, 3) dims = element.dimensions() data = [[(x0, y0), (x1, y1)] for x0, y0, x1, y1 in zip(*(element.dimension_values(d) for d in inds))] with abbreviated_exception(): style = self._apply_transforms(element, ranges, style) return (data,), style, {'dimensions': dims}
[docs]class RectanglesPlot(GeomMixin, ColorbarPlot): """ Rectanlges are polygons in 2D space where the key dimensions represent the bottom-left and top-right corner of the rectangle. """ style_opts = PolygonPlot.style_opts _nonvectorized_styles = ['cmap']
[docs] def init_artists(self, ax, plot_args, plot_kwargs): if 'c' in plot_kwargs: plot_kwargs['array'] = plot_kwargs.pop('c') if 'vmin' in plot_kwargs and 'vmax' in plot_kwargs: plot_kwargs['clim'] = plot_kwargs.pop('vmin'), plot_kwargs.pop('vmax') if not 'array' in plot_kwargs and 'cmap' in plot_kwargs: del plot_kwargs['cmap'] line_segments = PatchCollection(*plot_args, **plot_kwargs) ax.add_collection(line_segments) return {'artist': line_segments}
def get_data(self, element, ranges, style): # Get [x0, y0, x1, y1] inds = (1, 0, 3, 2) if self.invert_axes else (0, 1, 2, 3) x0s, y0s, x1s, y1s = (element.dimension_values(kd) for kd in inds) x0s, x1s = np.min([x0s, x1s], axis=0), np.max([x0s, x1s], axis=0) y0s, y1s = np.min([y0s, y1s], axis=0), np.max([y0s, y1s], axis=0) dims = element.dimensions() data = [Rectangle((x0, y0), x1, y1) for (x0, y0, x1, y1) in zip(x0s, y0s, x1s-x0s, y1s-y0s)] with abbreviated_exception(): style = self._apply_transforms(element, ranges, style) return (data,), style, {'dimensions': dims}