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#!/usr/bin/env python
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2016-2019 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This script is a simple example of how to add your own statistic to a
:class:`~silx.gui.plot.statsWidget.StatsWidget` from customs
:class:`~silx.gui.plot.stats.Stats` and display it.
On this example we will:
- show sum of values for each type
- compute curve integrals (only for 'curve').
- compute center of mass for all possible items
.. note:: for now the possible types manged by the Stats are ('curve', 'image',
'scatter' and 'histogram')
"""
__authors__ = ["H. Payno"]
__license__ = "MIT"
__date__ = "24/07/2018"
from silx.gui import qt
from silx.gui.colors import Colormap
from silx.gui.plot import Plot1D
from silx.gui.plot.stats.stats import StatBase
import numpy
class Integral(StatBase):
"""
Simple calculation of the line integral
"""
def __init__(self):
StatBase.__init__(self, name='integral', compatibleKinds=('curve',))
def calculate(self, context):
xData, yData = context.data
return numpy.trapz(x=xData, y=yData)
class COM(StatBase):
"""
Compute data center of mass
"""
def __init__(self):
StatBase.__init__(self, name='COM', description="Center of mass")
def calculate(self, context):
if context.kind in ('curve', 'histogram'):
xData, yData = context.data
deno = numpy.sum(yData).astype(numpy.float32)
if deno == 0.0:
return 0.0
else:
return numpy.sum(xData * yData).astype(numpy.float32) / deno
elif context.kind == 'scatter':
xData, yData, values = context.data
values = values.astype(numpy.float64)
deno = numpy.sum(values)
if deno == 0.0:
return float('inf'), float('inf')
else:
comX = numpy.sum(xData * values) / deno
comY = numpy.sum(yData * values) / deno
return comX, comY
def main():
app = qt.QApplication([])
plot = Plot1D()
x = numpy.arange(21)
y = numpy.arange(21)
plot.addCurve(x=x, y=y, legend='myCurve')
plot.addCurve(x=x, y=(y + 5), legend='myCurve2')
plot.setActiveCurve('myCurve')
plot.addScatter(x=[0, 2, 5, 5, 12, 20],
y=[2, 3, 4, 20, 15, 6],
value=[5, 6, 7, 10, 90, 20],
colormap=Colormap('viridis'),
legend='myScatter')
stats = [
('sum', numpy.sum),
Integral(),
(COM(), '{0:.2f}'),
]
plot.getStatsWidget().setStats(stats)
plot.getStatsWidget().parent().setVisible(True)
plot.show()
app.exec_()
if __name__ == '__main__':
main()
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