wxGUI Temporal Plot Tool - GRASS Manual
Author: GRASS Development Team
Description: wxGUI Temporal Plot Tool: GRASS Reference Manual

## wxGUI Temporal Plot Tool

## DESCRIPTION

The Temporal Plot Tool is a wxGUI component that queries and plots the values of a point, defined by a coordinate pair, in one or more temporal datasets (strds, stvds, str3ds).

Supported features:

- temporal datasets with interval/point and absolute/relative time,
- show simple linear regression model line with calculated formula

      y = a + b*x (y is dependent variable, a is intercept, b is slope, x is explanatory variable)

  and

      r-squared (parameter of goodness-of-fit measure for linear regression model)

- pop-up annotations with values information,
- query and plot multiple points via the command line,
- zoom and pan,
- change labels to x and y axes,
- add title to the plot, and
- export the time series values to a CSV file (x axis data has date time string format, if you want to use for calculating simple regression model in the R environment, LibreOffice etc., you will obtain a different calculated formula

      y = a + b*x

  because these software packages use a reference date other than the UNIX Epoch time (00:00:00 UTC on 1 January 1970)).

Figure: Temporal Plot Tool
To optionally add a title to the temporal plot and/or change the x and y axes labels, first type the desired text and then click Draw as showed below.
Figure: Add title and labels to a time series plot
To export the time series data to a text file (date and data values), type a name for the file and click Draw again. Optionally, set the check-box to print headers, as well.
Figure: Export time series values to a text file

## NOTES

g.gui.tplot requires the Python plotting library Matplotlib.

## SEE ALSO

Temporal data processing, wxGUI, wxGUI components

## AUTHOR

Luca Delucchi, Fondazione Edmund Mach, Italy

## SOURCE CODE

Available at: wxGUI Temporal Plot Tool source code (history)

Accessed: Sunday Jun 21 00:17:06 2026

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