Re: [D-RUG]: How to extract values from a raster?

[Erica Rettig]

extract() will let you extract from an extent object:

> r <- raster(ncol=10, nrow=10)

> values(r) <- 1:ncell(r)

> r2 <- extent(-180,180,49,51)

> extract(r, r2)

 [1] 21 22 23 24 25 26 27 28 29 30

to only get 1 cell, set the ymin/max based on the cell size of r to be one cell tall.

On Fri, Apr 14, 2017 at 9:00 AM, bic ton <bict...@gmail.com> wrote:

Hi everyone,

I have a raster 

library (raster)

r <- raster(ncol=10, nrow=10)

values(r) <- 1:ncell(r)

plot(r)

Now in the plot you see, I need to extract all values for the latitude 50 (for all longitudes).

Any idea?

Thanks

Bic

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Thanks,

Erica

Erica Rettig

PhD Candidate

Graduate Group in Ecology, UC Davis