mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-30 00:07:09 -04:00
108 lines
4.3 KiB
Python
108 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
MeanAndStdDevPlot.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'
|
|
|
|
import warnings
|
|
|
|
from qgis.core import (QgsProcessingParameterFeatureSource,
|
|
QgsProcessingParameterField,
|
|
QgsProcessingException,
|
|
QgsProcessingParameterFileDestination)
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
|
|
from processing.tools import vector
|
|
|
|
from qgis.PyQt.QtCore import QCoreApplication
|
|
|
|
|
|
class MeanAndStdDevPlot(QgisAlgorithm):
|
|
INPUT = 'INPUT'
|
|
OUTPUT = 'OUTPUT'
|
|
NAME_FIELD = 'NAME_FIELD'
|
|
VALUE_FIELD = 'VALUE_FIELD'
|
|
|
|
def group(self):
|
|
return self.tr('Plots')
|
|
|
|
def groupId(self):
|
|
return 'plots'
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
|
|
self.tr('Input table')))
|
|
self.addParameter(QgsProcessingParameterField(self.NAME_FIELD,
|
|
self.tr('Category name field'), parentLayerParameterName=self.INPUT,
|
|
type=QgsProcessingParameterField.Any))
|
|
self.addParameter(QgsProcessingParameterField(self.VALUE_FIELD,
|
|
self.tr('Value field'), parentLayerParameterName=self.INPUT))
|
|
|
|
self.addParameter(QgsProcessingParameterFileDestination(self.OUTPUT, self.tr('Plot'), self.tr('HTML files (*.html)')))
|
|
|
|
def name(self):
|
|
return 'meanandstandarddeviationplot'
|
|
|
|
def displayName(self):
|
|
return self.tr('Mean and standard deviation plot')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
try:
|
|
# importing plotly throws Python warnings from within the library - filter these out
|
|
with warnings.catch_warnings():
|
|
warnings.filterwarnings("ignore", category=ResourceWarning)
|
|
warnings.filterwarnings("ignore", category=ImportWarning)
|
|
import plotly as plt
|
|
import plotly.graph_objs as go
|
|
except ImportError:
|
|
raise QgsProcessingException(QCoreApplication.translate('MeanAndStdDevPlot', 'This algorithm requires the Python “plotly” library. Please install this library and try again.'))
|
|
|
|
source = self.parameterAsSource(parameters, self.INPUT, context)
|
|
if source is None:
|
|
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
|
|
|
|
namefieldname = self.parameterAsString(parameters, self.NAME_FIELD, context)
|
|
valuefieldname = self.parameterAsString(parameters, self.VALUE_FIELD, context)
|
|
|
|
output = self.parameterAsFileOutput(parameters, self.OUTPUT, context)
|
|
|
|
values = vector.values(source, namefieldname, valuefieldname)
|
|
|
|
d = {}
|
|
for i in range(len(values[namefieldname])):
|
|
v = values[namefieldname][i]
|
|
if v not in d:
|
|
d[v] = [values[valuefieldname][i]]
|
|
else:
|
|
d[v].append(values[valuefieldname][i])
|
|
|
|
data = []
|
|
for k, v in d.items():
|
|
data.append(go.Box(y=list(v),
|
|
boxmean='sd',
|
|
name=k
|
|
))
|
|
plt.offline.plot(data, filename=output, auto_open=False)
|
|
|
|
return {self.OUTPUT: output}
|