Description Usage Arguments Value Examples
Patch creation algorithm can occasionally leave single cells scattered within patches. This function reduces the "salt-pepper" effect, identifying or correcting those cells.
1 |
rst |
input raster landscape. |
rm |
logical, if TRUE returns the raster without single tones cells, if FALSE a vector of numbers identifying the index of single tones cells. |
A raster without single tones cells. If rm=FALSE
, it returns a vector of numbers identifying the index of single tones cells.
The value assigned to single tone cells is picked from one of the four neighbouring cells, selected at random.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | library(raster)
m = matrix(0, 33, 33)
r = raster(m, xmn=0, xmx=10, ymn=0, ymx=10)
patchSize = 500
## Make a patch and introduce a single tone cell
r = makePatch(r, patchSize, spt=578, rast=TRUE)
r[578] = 0
plot(r)
## Now remove it
plot( rmSingle(r) )
## Single tones can be identified but not removed:
rmSingle(r, rm = FALSE)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.