[GRASSLIST:101] RE: how to load data into d.vect.thematic ?

[Michael Barton]

D.vect.thematic reads data from an attribute table linked with a GRASS vector file. You don't have such an attribute table linked. 

Michael

______________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ  85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton




-----Original Message-----
From: Philipp H. Mohr [mailto:phm4 at kent.ac.uk]
Sent: Mon 3/13/2006 5:02 AM
To: GRASSLIST at baylor.edu
Subject: [GRASSLIST:37] how to load data into d.vect.thematic ?
 
Hello,

I have tried to use d.vect.thematic, but I ran into a few problems.
I load my data in with:

        cat grass.in | v.in.ascii out=mypoints3 x=2 y=1 cat=3 columns='cat int, x double, y double'

I can draw the vector mypoints3 without any problems. But when I try to
display this vector with:

        d.vect.thematic map=mypoints3 type=point column=cat themetype=graduated_colors themecalc=interval layer=1
        icon=basic/circle
        size=5 maxsize=20 nint=4 colorscheme=blue-red pointcolor=255:0:0
        linecolor=0:0:0 startcolor=255:0:0 endcolor=0:0:255
        monitor=x0

I get the ERROR: No such column [cat].
Could some one please tell me how to read the data in so that it can be
used with d.vect.thematic.

Thank you very much.
Regards,
Phil