Thank you very much Jim!!!

Your function achieves to color the grid tha way I want, but it can handle
only one variable, if I have understood correctly the details of this
function.The plot must display in the axes percentages and in the grids
pvalues. I have incorporated 3 different variables in a contourplot.

On Fri, Oct 5, 2012 at 12:08 PM, Jim Lemon <jim@bitwrit.com.au> wrote:

> On 10/04/2012 10:25 PM, Loukia Spineli wrote:
>
>> Dear R users,
>>
>> I have a 51 by 51 matrix of p-values (named as pvalue_MA). I want to
>> present graphically this matrix in a plot (filled contour plot) where both
>> axes represent probabilities. I have also added a grid in this plot. I
>> want
>> to highlight in white the cells of the grid that represent p-values
>> smaller
>> than the (common) significance threshold, 0.05. The code from this plot is
>> colored in blue (I had to copy-pasted all this code in order to reach to
>> the plot). I suspect that the "problem" might be in the col parameter of
>> the filled.contour function. Honestly, I cannot understand why the plot
>> appears to be completely white!! I checked the values of my variable and
>> it
>> has a great range from 0 to 1.
>> Any suggestion/ comment would really help me to move on with my project.
>>
>>  Hi Loukia,
> Do you really need a contour plot for this?
>
> pvals<-matrix(runif(2601),**nrow=51)
> library(plotrix)
> pcols<-ifelse(pvals<=0.05,"**white","gray")
> color2D.matplot(pvals,**cellcolors=pcols)
>
> Jim
>

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