[R] image 256 x 920 data points too slow

baptiste Auguié ba208 at exeter.ac.uk
Sun Oct 21 12:35:14 CEST 2007

Dear R gurus,

I'm trying to visualize a matrix 256 x 920 using image(), but i find  
the display too slow (~ 1 minute –– admittedly, my iBook G4 isn't  
very fast). The aim is not to get a good resolution image, but rather  
have a quick look at the matrix. I couldn't find a way to plot a  
smaller set of points from my data in a sensible manner (basically, i  
want to decrease the resolution). Is there an easy option for this  
purpose in image(), or possibly the lattice equivalent?

Minimal example:


Best regards,


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