trim | R Documentation |
Trim (shrink) a Raster* object by removing outer rows and columns that all have the same value (e.g. NA).
Or remove the whitespace before or after a string of characters (or a matrix, or the character values in a data.frame).
## S4 method for signature 'Raster'
trim(x, padding=0, values=NA, filename='', ...)
## S4 method for signature 'character'
trim(x, internal=FALSE, ...)
x |
Raster* object or a character string |
values |
numeric. Value(s) based on which a Raster* should be trimmed |
padding |
integer. Number of outer rows/columns to keep |
filename |
character. Optional output filename |
internal |
logical. If |
... |
If |
A RasterLayer or RasterBrick object (if x
is a Raster* object) or a character string (if x
is a character string).
Robert J. Hijmans and Jacob van Etten
r <- raster(ncol=18,nrow=18)
r[39:49] <- 1
r[113:155] <- 2
r[200] <- 6
s <- trim(r)
trim(" hi folks ! ")
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