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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: gallery 30
"""
Scatter plot and histograms
===========================
A scatter plot of 2D points with matching histograms.
"""
import numpy as np
import vispy.plot as vp
np.random.seed(2324)
n = 100000
data = np.empty((n, 2))
lasti = 0
for i in range(1, 20):
nexti = lasti + (n - lasti) // 2
scale = np.abs(np.random.randn(2)) + 0.1
scale[1] = scale.mean()
data[lasti:nexti] = np.random.normal(size=(nexti-lasti, 2),
loc=np.random.randn(2),
scale=scale / i)
lasti = nexti
data = data[:lasti]
color = (0.3, 0.5, 0.8)
n_bins = 100
fig = vp.Fig(show=False)
line = fig[0:4, 0:4].plot(data, symbol='o', width=0,
face_color=color + (0.02,), edge_color=None,
marker_size=4)
line.set_gl_state(depth_test=False)
fig[4, 0:4].histogram(data[:, 0], bins=n_bins, color=color, orientation='h')
fig[0:4, 4].histogram(data[:, 1], bins=n_bins, color=color, orientation='v')
if __name__ == '__main__':
fig.show(run=True)
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