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88 lines
3.6 KiB
Python
88 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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EquivalentNumField.py
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---------------------
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Date : January 2013
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Copyright : (C) 2013 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'January 2013'
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__copyright__ = '(C) 2013, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import plotly as plt
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import plotly.graph_objs as go
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from qgis.core import (QgsProcessingParameterFeatureSource,
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QgsProcessingParameterField,
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QgsProcessingUtils,
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QgsProcessingParameterFileDestination,
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QgsProcessingOutputHtml)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.tools import vector
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class VectorLayerScatterplot(QgisAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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XFIELD = 'XFIELD'
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YFIELD = 'YFIELD'
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def group(self):
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return self.tr('Graphics')
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def __init__(self):
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super().__init__()
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def initAlgorithm(self, config=None):
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
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self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterField(self.XFIELD,
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self.tr('X attribute'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.Numeric))
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self.addParameter(QgsProcessingParameterField(self.YFIELD,
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self.tr('Y attribute'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.Numeric))
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self.addParameter(QgsProcessingParameterFileDestination(self.OUTPUT, self.tr('Scatterplot'), self.tr('HTML files (*.html)')))
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self.addOutput(QgsProcessingOutputHtml(self.OUTPUT, self.tr('Scatterplot')))
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def name(self):
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return 'vectorlayerscatterplot'
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def displayName(self):
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return self.tr('Vector layer scatterplot')
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def processAlgorithm(self, parameters, context, feedback):
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source = self.parameterAsSource(parameters, self.INPUT, context)
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xfieldname = self.parameterAsString(parameters, self.XFIELD, context)
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yfieldname = self.parameterAsString(parameters, self.YFIELD, context)
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output = self.parameterAsFileOutput(parameters, self.OUTPUT, context)
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values = vector.values(source, xfieldname, yfieldname)
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data = [go.Scatter(x=values[xfieldname],
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y=values[yfieldname],
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mode='markers')]
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plt.offline.plot(data, filename=output, auto_open=False)
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return {self.OUTPUT: output}
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