g.gui.tplot - GRASS GIS manual

NAME

g.gui.tplot - Plots the values of temporal datasets.

KEYWORDS

SYNOPSIS

g.gui.tplot

g.gui.tplot --help

g.gui.tplot [-hl] [stvds=name[,name,...]] [strds=name[,name,...]] [coordinates=east,north] [cats=string] [attr=string] [output=name] [csv=name] [title=string] [xlabel=string] [ylabel=string] [size=string] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-h: Set the header of CSV file, to be used with csv option
-l: Show simple linear regression model line
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

stvds=name[,name,...]: Name of the input space time vector datasets
strds=name[,name,...]: Name of the input space time raster datasets
coordinates=east,north: Coordinates
cats=string: Categories of vectors features; To use only with stvds
attr=string: Name of attribute; Name of attribute which represent data for plotting
output=name: Name for output graphical file; Full path for output file containing the plot, ddd extension to specify format (.png, .pdf, .svg)
csv=name: Name for output CSV file; Full path for the CSV file containing the plotted data
title=string: Title for plot; The title for the output plot
xlabel=string: Label for x axis; The x axis label for the output plot
ylabel=string: Label for y axis; The y axis label for the output plot
size=string: Size of output image as width,height in pixels; It works only with output parameter

DESCRIPTION
NOTES
SEE ALSO
AUTHOR

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.