raster (version 2.1-41)

trim: Trim

Description

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 chracter values in a data.frame).

Usage

## S3 method for class 'Raster':
trim(x, padding=0, values=NA, filename='', ...)
## S3 method for class 'character':
trim(x, ...)

Arguments

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

...

If x is a Raster* object: additional arguments as for writeRaster

Value

• A RasterLayer or RasterBrick object (if x is a Raster* object) or a character string (if x is a character string).

Examples

r <- raster(ncol=18,nrow=18)
r[39:49] <- 1
r[113:155] <- 2
r[200] <- 6
s <- trim(r) 


trim("hi folks   ")