[GRASS-stats] counting/sorting lineament lenght according to their azimuth in R

[Carlos "Guâno" Grohmann]

Hello all

I was laying around with R packages to do some rose plots. I've found
some, but none gives me what I really want (maybe because they were
made by climatologists and I am a geologist?)

What I want? 2 kinds of rose plots. One where the size of the petals
is proporcional to the frequency (number) of lineaments in a given
direction. Some packages do this, including heR.Misc
(http://www.exposurescience.org). So far, we're good.

Now the second kind of rose plot. In this one, the size of the petal
is proporcional to the accumulated length of the lineaments in that
direction.

The length attribute I get from GRASS, the azimuths, in R (from the
start_x, start_y, end_x, end_y GRASS gives me)

Now, how can I sort/sum the lengths based on the azimuth?

TIA

carlos




-- 
+-----------------------------------------------------------+
 Carlos Henrique Grohmann - Guano
 Geologist M.Sc - Doctorate Student at IGc-USP - Brazil
Linux User #89721 - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
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