mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-06 00:05:02 -05:00
77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
BarPlot.py
|
|
---------------------
|
|
Date : January 2013
|
|
Copyright : (C) 2013 by Victor Olaya
|
|
Email : volayaf at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Victor Olaya'
|
|
__date__ = 'January 2013'
|
|
__copyright__ = '(C) 2013, Victor Olaya'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import matplotlib.pyplot as plt
|
|
import matplotlib.pylab as lab
|
|
import numpy as np
|
|
from PyQt4.QtCore import *
|
|
from qgis.core import *
|
|
from processing.core.parameters import ParameterTable
|
|
from processing.core.parameters import ParameterTableField
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.outputs import OutputHTML
|
|
from processing.tools import *
|
|
|
|
|
|
class BarPlot(GeoAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
OUTPUT = 'OUTPUT'
|
|
NAME_FIELD = 'NAME_FIELD'
|
|
VALUE_FIELD = 'VALUE_FIELD'
|
|
|
|
def processAlgorithm(self, progress):
|
|
uri = self.getParameterValue(self.INPUT)
|
|
layer = getObjectFromUri(uri)
|
|
namefieldname = self.getParameterValue(self.NAME_FIELD)
|
|
valuefieldname = self.getParameterValue(self.VALUE_FIELD)
|
|
output = self.getOutputValue(self.OUTPUT)
|
|
values = vector.getAttributeValues(layer, namefieldname,
|
|
valuefieldname)
|
|
plt.close()
|
|
|
|
ind = np.arange(len(values[namefieldname]))
|
|
width = 0.8
|
|
plt.bar(ind, values[valuefieldname], width, color='r')
|
|
|
|
plt.xticks(ind, values[namefieldname], rotation=45)
|
|
plotFilename = output + '.png'
|
|
lab.savefig(plotFilename)
|
|
f = open(output, 'w')
|
|
f.write('<img src="' + plotFilename + '"/>')
|
|
f.close()
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = 'Bar plot'
|
|
self.group = 'Graphics'
|
|
self.addParameter(ParameterTable(self.INPUT, self.tr('Input table')))
|
|
self.addParameter(ParameterTableField(self.NAME_FIELD,
|
|
self.tr('Category name field'), self.INPUT))
|
|
self.addParameter(ParameterTableField(self.VALUE_FIELD,
|
|
self.tr('Value field'), self.INPUT))
|
|
self.addOutput(OutputHTML(self.OUTPUT, self.tr('Output')))
|