## table of contents

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: Saturday Jul 27 17:10:08 2024

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