I have the methylation data of human methylation450k.
The IDAT files were read with the minfi package.
Then preprocessFunnorm(RGChannelSet) was done.
I tried to plot the overall density distiribution on beta values and that of the I and II probe types using the plotBetasByType function of the package.
But the function can be used only for a MethylSet or a matrix.
Is there a way to use the function on the GenomicRatioSet-class ?