On Feb 14, 2013, at 1:10 AM, jas wrote:
Hello everybody,
I have an Ascii-grid (100x100m) with population density over
Switzerland
(local coordinations system, CH LV03). Now I would like to have a nice
graphic to present the data. I would like to make a plot that will
show the
density as the z-variable and raise for example a stacking pillar
showing
how high the density is in that hectare. I attached a map that's
similar to
what I would like, to give you an idea incase I am not making myself
clear.
<http://r.789695.n4.nabble.com/file/n4658517/Bildschirmfoto_2013-02-14_um_10.08.51.png
>
Can you tell me how I can do this? I tried persp and persp3d, but
there the
x and y-vectors have to be increasing values, where as the
coordinates in a
grid don't necessarily increase for both x and y, as they follow the
line
horizontally...
I thought you said you had a 'grid' presumably with values at the
intersections of the grid? That is the sort of input that persp will
take. You would supply x=seq( ..., length=100), y= seq( ... ,
length=100) and your 'grid' (which I assume is stored as a matrix) as
z values. In fact if you just supply a matrix as the z value to persp
you will get an automatic display, just not with the labels you might
have hoped for.
--
David Winsemius, MD
Alameda, CA, USA
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