On 15/03/13 20:38, Margherita Di Leo wrote:
Hi all,
trying to rescale a map to 0:255 range, I run:
r.univar -g map
n=9599576
null_cells=0
cells=9599576
min=-1.55537462234497
max=274.231811523438
range=275.787186145782
mean=96.915776629461
mean_of_abs=96.915791505254
stddev=37.6540983935747
variance=1417.831125833
coeff_var=38.8523929778099
sum=930350363.3535346985
taking the max, i run:
r.mapcalc "map.invscaled = round((1.0 - map / 274.231811523438) * 255.0)"
Just out of curiosity: why use r.mapcalc and not r.recode ? Is there any
advantage of the former over the latter ?
Moritz
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