[GRASS-user] scatterplot: vector/point data

GRASS GRASS user
1

Hi All,
Is there any GRASS command available to draw a scatter plot from the vector (point) attribute table. There are 3 columns in the attribute table (cat, value1, value2). I need to draw a scatter plot (value1 vs value2) in GRASS.

Thanks

2

Hei Humaria,

I am not aware of a GUI tool for that, sorry. But you have the full power of R (https://cran.r-project.org/) at your fingertips:

In your GRASS console start R and then

Load GRASS library

library(“rgrass7”)

Fetch attributes

attributes ← execGRASS(“v.db.select”, map=’yourvectormap’, separator=’,’)

Parse the result

con ← textConnection(attributes)

data ← read.csv(con, header=TRUE)

str(data)

#Make your plot

plot(value1 ~ value2, data=data)

See also:

https://grasswiki.osgeo.org/wiki/R_statistics/rgrass7

http://www.statmethods.net/graphs/scatterplot.html

Cheers

Stefan

···

Hi All,

Is there any GRASS command available to draw a scatter plot from the vector (point) attribute table. There are 3 columns in the attribute table (cat, value1, value2). I need to draw a scatter plot (value1 vs value2) in GRASS.

Thanks