CODEWITHSUNDEEP
rraster
Emily
Emily

Reputation: 865

Load raster as matrix

Is there an easy way to load a raster directly into R as a matrix, instead of loading the raster, then using as.matrix() to transform it into a matrix, i.e.

myras <- raster("file.tif")
mymat <- as.matrix(myras)

Upvotes: 2

Views: 1880

Answers (2)

loki
loki

Reputation: 10340

Another possible solution would be to use as like this: 

library(raster)
mymat <- as(raster("file.tif"), "matrix")

Keep in mind, that reading a matrix directly from a file is not always an option. Since you are using a tiff file, you might have a compressed raster (e.g. by LZW, Packbits, etc.). Thus it is necessary to load and uncompress the raster first, before accessing the raster values and transform them into a matrix.

Upvotes: 2

Robert Hijmans
Robert Hijmans

Reputation: 47036

There are similar alternatives, but I do not think there is an easier way. (except perhaps for png and some other graphics formats?). Without further explanation, it seems an odd question, as what you show is very concise. You can combine your two statements into one line (adding 8 characters to as.matrix) 

library(raster)
myras <- as.matrix(raster("file.tif"))

Upvotes: 1

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