25.1.10. Plots

Bar plot
Box plot
Mean and standard deviation plot
Polar plot
Raster layer histogram
Vector layer histogram
Vector layer scatterplot
Vector layer scatterplot 3D

25.1.10.1. Bar plot 

Creates a bar plot from a category and a layer field.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
Category field name	`NAME_FIELD`	[tablefield: any]	Categorical field to use for grouping the bars (X axis)
Value field	`VALUE_FIELD`	[tablefield: any]	Value to use for the plot (Y axis).
Bar plot	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Bar plot	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:barplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.2. Box plot 

Creates a box plot from a category field and a numerical layer field.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
Category name field	`NAME_FIELD`	[tablefield: any]	Categorical field to use for grouping the boxes (X axis)
Value field	`VALUE_FIELD`	[tablefield: any]	Value to use for the plot (Y axis).
Additional statistic lines	`MSD`	[enumeration] Default: 0	Additional statistics information to add to the plot. One of: 0 — Show Mean 1 — Show Standard Deviation 2 — Don’t show mean and standard deviation
Box plot	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Box plot	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:boxplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.3. Mean and standard deviation plot 

Creates a box plot with mean and standard deviation values.

Parameters

Label	Name	Type	Description
Input table	`INPUT`	[vector: any]	Input vector layer
Category name field	`NAME_FIELD`	[tablefield: any]	Categorical field to use for grouping the boxes (X axis)
Value field	`VALUE_FIELD`	[tablefield: any]	Value to use for the plot (Y axis).
Plot	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Plot	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:meanandstandarddeviationplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.4. Polar plot 

Generates a polar plot based on the value of an input vector layer.

Two fields must be entered as parameters: one that defines the category each feature (to group features) and another one with the variable to plot (this has to be a numeric one).

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
Category name field	`NAME_FIELD`	[tablefield: any]	Categorical field to use for grouping the features (X axis)
Value field	`VALUE_FIELD`	[tablefield: any]	Value to use for the plot (Y axis).
Polar plot	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Polar plot	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:polarplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.5. Raster layer histogram 

Generates a histogram with the values of a raster layer.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[raster]	Input raster layer
Band number	`BAND`	[raster band]	Raster band to use for the histogram
number of bins	`BINS`	[number] Default: 10	The number of bins to use in the histogram (X axis). Minimum 2.
Histogram	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Histogram	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:rasterlayerhistogram

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.6. Vector layer histogram 

Generates a histogram with the values of the attribute of a vector layer.

The attribute to use for computing the histogram must be numeric.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
Attribute	`FIELD`	[tablefield: any]	Value to use for the plot (Y axis).
number of bins	`BINS`	[number] Default: 10	The number of bins to use in the histogram (X axis). Minimum 2.
Histogram	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Histogram	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:vectorlayerhistogram

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.7. Vector layer scatterplot 

Creates a simple X - Y scatter plot for a vector layer.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
X attribute	`XFIELD`	[tablefield: any]	Field to use for the X axis
Y attribute	`YFIELD`	[tablefield: any]	Field to use for the Y axis
Scatterplot	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Scatterplot	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:vectorlayerscatterplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

25.1.10.8. Vector layer scatterplot 3D 

Creates a 3D scatter plot for a vector layer.

Parameters

Label	Name	Type	Description
Input layer	`INPUT`	[vector: any]	Input vector layer
X attribute	`XFIELD`	[tablefield: any]	Field to use for the X axis
Y attribute	`YFIELD`	[tablefield: any]	Field to use for the Y axis
Z attribute	`ZFIELD`	[tablefield: any]	Field to use for the Z axis
Histogram	`OUTPUT`	[html] Default: `[Save to temporary file]`	Specify the HTML file for the plot. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Histogram	`OUTPUT`	[html]	HTML file with the plot. Available in the Processing ► Result Viewer.

Python code

Algorithm ID: qgis:scatter3dplot

import processing
processing.run("algorithm_id", {parameter_dictionary})

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.