Using d.vect.chart ctype=pie sizecol="sizecol" worked to display the data as desired (although a fudged scale was necessary because the meter values in the sizecol were read as pixel values??). I am not yet enough script-savvy to attempt your option (b), but will consider it in the future if ps.map is not already outfitted with this option.
Thanks again,
Chris
C. H. Roosevelt
Archaeology Department
Boston University
675 Commonwealth Avenue
Boston, MA, 02215-1406
Tel: (617) 358-1652 (direct)
Tel: (617) 353-3415 (main office)
Fax: (617) 353-6800
E-mail: chr@bu.edu
On Aug 20, 2005, at 11:08 PM, Hamish wrote:
I am having difficulties trying to print vector points at meaningful sizes
(using Lorenzo Moretti's most recent 6.1.cvs on MacOS 10.3.9).
I have a vector point file with points corresponding to the peaks of conical
mounds; mound diameters in meters are stored in the attached attribute table.
I have successfully used ps.map to output the points to an .eps file, but is
there any way to display or print the points so that their sizes correspond
exactly to a value in the attribute table (mound diameters)? I see that
d.vect.thematic can do something similar with graduated sizes or colors,
but what about exact values?
If there is no way to do this, could someone point me in the direction of the
presumably simple workaround of converting vector points to vector areas
with new area diameters derived from the attribute table?
This is not (yet) possible in ps.map. Planned for the future.
In the mean time you can try a couple of things to make a bubble plot:
a) d.vect.chart ctype=pie sizecol=
then d.out.png ..?
b) write a script that runs v.buffer for each point with dist= based on
the value, then v.patch (and repeat).
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