/usr/share/pyshared/guiqwt/tests/hist2d.py is in python-guiqwt 2.3.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | # -*- coding: utf-8 -*-
#
# Copyright © 2009-2010 CEA
# Pierre Raybaut
# Licensed under the terms of the CECILL License
# (see guiqwt/__init__.py for details)
"""2-D Histogram test"""
SHOW = True # Show test in GUI-based test launcher
from numpy import random, array, dot, concatenate
from guiqwt.plot import ImageDialog
from guiqwt.builder import make
from guiqwt.config import _
def hist2d(X, Y):
win = ImageDialog(edit=True, toolbar=True,
wintitle="2-D Histogram X0=(0,1), X1=(-1,-1)")
hist2d = make.histogram2D(X, Y, 200, 200)
curve = make.curve(X[::50], Y[::50],
linestyle='', marker='+', title=_("Markers"))
plot = win.get_plot()
plot.set_aspect_ratio(lock=False)
plot.set_antialiasing(False)
plot.add_item(hist2d)
plot.add_item(curve)
plot.set_item_visible(curve, False)
win.show()
win.exec_()
if __name__ == "__main__":
import guidata
_app = guidata.qapplication()
N = 150000
m = array([[ 1., .2], [-.2, 3.]])
X1 = random.normal(0, .3, size=(N, 2))
X2 = random.normal(0, .3, size=(N, 2))
X = concatenate((X1+[0, 1.], dot(X2, m)+[-1, -1.]))
hist2d(X[:, 0], X[:, 1])
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