Hi,
I'm looking at a very simple picture created with rasterImage.
foo <- matrix(1:9,3,3)
foo[,] <- rainbow(9)
plot(0:1,0:1,t='n')
rasterImage(foo,0,0,1,1)
If I choose to specify interpolate=F, I get the expected 9 blocks of
color. My question is: how many values (aka pixels) does rasterImage
use as it interpolates from one input cell to the next? And I suppose I
should ask if there's a way to control the size of the interpolation
region as well.
I do recognize that rasterImage doesn't return anything, so it's not as
though I'm trying to save a matrix of the interpolated pixel values. I
just would like to get a feel for what's being done to my source data.
thanks
Carl
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