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5339d62715
Include descriptive text with the specified parameter value in error, and always check that sources were loaded to avoid raw Python exceptions when they are not
117 lines
4.4 KiB
Python
117 lines
4.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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BarPlot.py
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---------------------
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Date : March 2015
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Copyright : (C) 2017 by Matteo Ghetta
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Email : matteo dot ghetta 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__ = 'Matteo Ghetta'
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__date__ = 'March 2017'
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__copyright__ = '(C) 2017, Matteo Ghetta'
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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 (QgsProcessingException,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterField,
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QgsProcessingParameterEnum,
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QgsProcessingParameterFileDestination,
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QgsFeatureRequest)
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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 BoxPlot(QgisAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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NAME_FIELD = 'NAME_FIELD'
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VALUE_FIELD = 'VALUE_FIELD'
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MSD = 'MSD'
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def group(self):
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return self.tr('Graphics')
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def groupId(self):
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return '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.NAME_FIELD,
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self.tr('Category name field'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.Any))
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self.addParameter(QgsProcessingParameterField(self.VALUE_FIELD,
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self.tr('Value field'),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.Numeric))
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msd = [self.tr('Show Mean'),
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self.tr('Show Standard Deviation'),
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self.tr('Don\'t show Mean and Standard Deviation')
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]
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self.addParameter(QgsProcessingParameterEnum(
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self.MSD,
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self.tr('Additional Statistic Lines'),
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options=msd, defaultValue=0))
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self.addParameter(QgsProcessingParameterFileDestination(self.OUTPUT, self.tr('Box plot'), self.tr('HTML files (*.html)')))
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def name(self):
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return 'boxplot'
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def displayName(self):
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return self.tr('Box plot')
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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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if source is None:
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raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
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namefieldname = self.parameterAsString(parameters, self.NAME_FIELD, context)
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valuefieldname = self.parameterAsString(parameters, self.VALUE_FIELD, context)
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output = self.parameterAsFileOutput(parameters, self.OUTPUT, context)
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values = vector.values(source, valuefieldname)
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x_index = source.fields().lookupField(namefieldname)
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x_var = [i[namefieldname] for i in source.getFeatures(QgsFeatureRequest().setFlags(QgsFeatureRequest.NoGeometry).setSubsetOfAttributes([x_index]))]
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msdIndex = self.parameterAsEnum(parameters, self.MSD, context)
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msd = True
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if msdIndex == 1:
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msd = 'sd'
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elif msdIndex == 2:
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msd = False
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data = [go.Box(
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x=x_var,
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y=values[valuefieldname],
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boxmean=msd)]
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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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