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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 character values in a data.frame).

Usage

## S4 method for signature 'Raster'
trim(x, padding=0, values=NA, filename='', ...)
## S4 method for signature 'character'
trim(x, internal=FALSE, ...)

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
internal

logical. If TRUE, sequential internal spaces are replaced by a single space
...

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).

Author(s)

Robert J. Hijmans and Jacob van Etten

Examples

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


trim("    hi folks    !   ")
raster

Geographic Data Analysis and Modeling

v3.4-10
GPL (>= 3)
Authors
Robert J. Hijmans [cre, aut] (<https://orcid.org/0000-0001-5872-2872>), Jacob van Etten [ctb], Michael Sumner [ctb], Joe Cheng [ctb], Dan Baston [ctb], Andrew Bevan [ctb], Roger Bivand [ctb], Lorenzo Busetto [ctb], Mort Canty [ctb], Ben Fasoli [ctb], David Forrest [ctb], Aniruddha Ghosh [ctb], Duncan Golicher [ctb], Josh Gray [ctb], Jonathan A. Greenberg [ctb], Paul Hiemstra [ctb], Kassel Hingee [ctb], Institute for Mathematics Applied Geosciences [cph], Charles Karney [ctb], Matteo Mattiuzzi [ctb], Steven Mosher [ctb], Babak Naimi [ctb], Jakub Nowosad [ctb], Edzer Pebesma [ctb], Oscar Perpinan Lamigueiro [ctb], Etienne B. Racine [ctb], Barry Rowlingson [ctb], Ashton Shortridge [ctb], Bill Venables [ctb], Rafael Wueest [ctb]
Initial release
2021-05-02

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