[BioC] aCGH modify plotting method

[Christopher, Neil (NIH/NCI)]

Hello,

I am trying to use the aCGH package to find and plot copy number.  I would
like to modify the function plotHmmStates so that I can control the yScale.
However, I cannot find the source code for this function.  It is usually in
the R directory under the package folder.  However, there is only an RDX and
RDB file.  Are these files compressed archives of the code? If so, how can I
access and change the code?

Thanks,
Neil