[R] large data set (matrix) using image()

Uwe Ligges ligges at statistik.tu-dortmund.de
Thu Dec 29 16:19:51 CET 2011

Works perfectly well with R-2.14.1 32-bit on a Windows device. Since you 
have not followed the posting guide and forgot to give details about 
your platform, there is not much we can do.

Uwe Ligges

On 22.12.2011 23:08, Karen Liu wrote:
> When I use the image() function for a relatively small matrix it works perfectly, eg.x<- 1:100
>> z<- matrix(rnorm(10^4),10^2,10^2)
>> image(x=x,y=x,z=z,col=rainbow(3))but when I want to plot a larger matrix, it doesn't really work. Most of the times, it just plot a few intermitent points.x<- 1:1000
> z<- matrix(rnorm(10^6),10^3,10^3)
> image(x=x,y=x,z=z,col=rainbow(3))
> Generating the matrix didn't seem to be a problem. I would appreciate any thoughts and ideas.
> I have tried using heatmap in bioconductor. However, I want to substitute the dendograms with axes, but when I suppressed the dendogram, I can't successfully add any axis. If anyone knows heatmap() well and would like to help via this function, it would work also.
> Cheers!Karen Liu 		 	   		
> 	[[alternative HTML version deleted]]
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