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wxGUI.tplot(1grass) GRASS GIS User's Manual wxGUI.tplot(1grass)

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: Thursday Mar 07 18:17:06 2024

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GRASS 8.3.2