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testviolinplot.py
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testviolinplot.py
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from __future__ import absolute_import
import numpy as np
from holoviews.element import Violin
from holoviews.operation.stats import univariate_kde
from .testplot import TestBokehPlot, bokeh_renderer
try:
from bokeh.models import LinearColorMapper, CategoricalColorMapper
except:
pass
class TestBokehViolinPlot(TestBokehPlot):
def test_violin_simple(self):
values = np.random.rand(100)
violin = Violin(values).opts(plot=dict(violin_width=0.7))
qmin, q1, q2, q3, qmax = (np.percentile(values, q=q)
for q in range(0,125,25))
iqr = q3 - q1
upper = min(q3 + 1.5*iqr, np.nanmax(values))
lower = max(q1 - 1.5*iqr, np.nanmin(values))
r1, r2 = violin.range(0)
kde = univariate_kde(violin, cut=5)
xs, ys = (kde.dimension_values(i) for i in range(2))
ys = (ys/ys.max())*(0.7/2.)
ys = [('',)+(sign*y,) for sign, vs in ((-1, ys), (1, ys[::-1])) for y in vs]
kde = {'x': np.concatenate([xs, xs[::-1]]), 'y': ys}
plot = bokeh_renderer.get_plot(violin)
self.assertEqual(plot.handles['x_range'].factors, [''])
self.assertEqual(plot.handles['y_range'].start, r1)
self.assertEqual(plot.handles['y_range'].end, r2)
self.assertIn('scatter_1_glyph_renderer', plot.handles)
self.assertIn('vbar_1_glyph_renderer', plot.handles)
seg_source = plot.handles['segment_1_source']
self.assertEqual(seg_source.data['x'], [('', 0)])
self.assertEqual(seg_source.data['y0'], [lower])
self.assertEqual(seg_source.data['y1'], [upper])
scatter_source = plot.handles['scatter_1_source']
self.assertEqual(scatter_source.data['x'], [('', 0)])
self.assertEqual(scatter_source.data['y'], [q2])
patch_source = plot.handles['patches_1_source']
self.assertEqual(patch_source.data['xs'], [kde['y']])
self.assertEqual(patch_source.data['ys'], [kde['x']])
def test_box_whisker_multi_level(self):
box= Violin((['A', 'B']*15, [3, 10, 1]*10, np.random.randn(30)),
['Group', 'Category'], 'Value')
plot = bokeh_renderer.get_plot(box)
x_range = plot.handles['x_range']
self.assertEqual(x_range.factors, [
('A', '1'), ('A', '3'), ('A', '10'), ('B', '1'), ('B', '3'), ('B', '10')])
def test_violin_inner_quartiles(self):
values = np.random.rand(100)
violin = Violin(values).opts(plot=dict(inner='quartiles'))
kde = univariate_kde(violin, cut=5)
xs = kde.dimension_values(0)
plot = bokeh_renderer.get_plot(violin)
self.assertIn('segment_1_glyph_renderer', plot.handles)
seg_source = plot.handles['segment_1_source']
q1, q2, q3 = (np.percentile(values, q=q) for q in range(25,100,25))
y0, y1, y2 = [xs[np.argmin(np.abs(xs-v))] for v in (q1, q2, q3)]
self.assertEqual(seg_source.data['x'], np.array([y0, y1, y2]))
def test_violin_inner_stick(self):
values = np.random.rand(100)
violin = Violin(values).opts(plot=dict(inner='stick'))
kde = univariate_kde(violin, cut=5)
xs = kde.dimension_values(0)
plot = bokeh_renderer.get_plot(violin)
self.assertIn('segment_1_glyph_renderer', plot.handles)
segments = np.array([xs[np.argmin(np.abs(xs-v))] for v in values])
self.assertEqual(plot.handles['segment_1_source'].data['x'],
segments)
def test_violin_multi(self):
violin = Violin((np.random.randint(0, 2, 100), np.random.rand(100)), kdims=['A']).sort()
r1, r2 = violin.range(1)
plot = bokeh_renderer.get_plot(violin)
self.assertEqual(plot.handles['x_range'].factors, ['0', '1'])
def test_violin_empty(self):
violin = Violin([])
plot = bokeh_renderer.get_plot(violin)
patch_source = plot.handles['patches_1_source']
self.assertEqual(patch_source.data['xs'], [[]])
self.assertEqual(patch_source.data['ys'], [np.array([])])
###########################
# Styling mapping #
###########################
def test_violin_linear_color_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5), 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(violin_color='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['patches_1_source']
cmapper = plot.handles['violin_color_color_mapper']
glyph = plot.handles['patches_1_glyph']
self.assertEqual(source.data['violin_color'], np.arange(5))
self.assertTrue(cmapper, LinearColorMapper)
self.assertEqual(cmapper.low, 0)
self.assertEqual(cmapper.high, 4)
self.assertEqual(glyph.fill_color, {'field': 'violin_color', 'transform': cmapper})
def test_violin_categorical_color_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(['A', 'B', 'C', 'D', 'E'], 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(violin_color='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['patches_1_source']
glyph = plot.handles['patches_1_glyph']
cmapper = plot.handles['violin_color_color_mapper']
self.assertEqual(source.data['violin_color'], b[::5])
self.assertTrue(cmapper, CategoricalColorMapper)
self.assertEqual(cmapper.factors, ['A', 'B', 'C', 'D', 'E'])
self.assertEqual(glyph.fill_color, {'field': 'violin_color', 'transform': cmapper})
def test_violin_alpha_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5)/10., 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(violin_alpha='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['patches_1_source']
glyph = plot.handles['patches_1_glyph']
self.assertEqual(source.data['violin_alpha'], np.arange(5)/10.)
self.assertEqual(glyph.fill_alpha, {'field': 'violin_alpha'})
def test_violin_line_width_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5), 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(violin_line_width='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['patches_1_source']
glyph = plot.handles['patches_1_glyph']
self.assertEqual(source.data['violin_line_width'], np.arange(5))
self.assertEqual(glyph.line_width, {'field': 'violin_line_width'})
def test_violin_box_linear_color_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5), 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(box_color='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['vbar_1_source']
cmapper = plot.handles['box_color_color_mapper']
glyph = plot.handles['vbar_1_glyph']
self.assertEqual(source.data['box_color'], np.arange(5))
self.assertTrue(cmapper, LinearColorMapper)
self.assertEqual(cmapper.low, 0)
self.assertEqual(cmapper.high, 4)
self.assertEqual(glyph.fill_color, {'field': 'box_color', 'transform': cmapper})
def test_violin_box_categorical_color_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(['A', 'B', 'C', 'D', 'E'], 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(box_color='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['vbar_1_source']
glyph = plot.handles['vbar_1_glyph']
cmapper = plot.handles['box_color_color_mapper']
self.assertEqual(source.data['box_color'], b[::5])
self.assertTrue(cmapper, CategoricalColorMapper)
self.assertEqual(cmapper.factors, ['A', 'B', 'C', 'D', 'E'])
self.assertEqual(glyph.fill_color, {'field': 'box_color', 'transform': cmapper})
def test_violin_box_alpha_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5)/10., 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(box_alpha='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['vbar_1_source']
glyph = plot.handles['vbar_1_glyph']
self.assertEqual(source.data['box_alpha'], np.arange(5)/10.)
self.assertEqual(glyph.fill_alpha, {'field': 'box_alpha'})
def test_violin_box_line_width_op(self):
a = np.repeat(np.arange(5), 5)
b = np.repeat(np.arange(5), 5)
violin = Violin((a, b, np.arange(25)), ['a', 'b'], 'd').options(box_line_width='b')
plot = bokeh_renderer.get_plot(violin)
source = plot.handles['vbar_1_source']
glyph = plot.handles['vbar_1_glyph']
self.assertEqual(source.data['box_line_width'], np.arange(5))
self.assertEqual(glyph.line_width, {'field': 'box_line_width'})