[R] Plot multiple columns

From: Noah Silverman <noah_at_smartmediacorp.com>
Date: Tue, 01 Jun 2010 01:02:52 -0700


I'm running a long MCMC chain that is generating samples for 22 variables.

I have each run of the chain as a row in a matrix.

So: Chain[,1] is the column with all the samples for variable one. Chain[,2] is the column with all the samples for variable 2, etc.

I'd like to fit all 22 on a single page to print a nice summary. It is OK if the graphs are small, I just need to show the overall shape and convergence.

Using par(mfrow=(11,2)) gives me the error: "figure margins too large" when I try to draw a plot
I looked at the Lattice package, which seems very promising, but I can't figure out how to have it plot each column in a separate box.

I need to do this same "one page" summary about 50 times, so it would be a nightmare to make over 1,000 plots by hand.

Ideally, I'd create a loop for each of the 50 runs that would generate a single page containing the 22 plots.

In pseudocode:

for( i in 1:50){

    par(mfrow(11,2))
    for(j in 1:22){

        plot(Chain[,j], type="l")
    }
}

BUT, this doesn't work.

Does anyone have any ideas about an easy way to do this?

Thanks!



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