Dear all,

I have a S4 object (HTCexp from HITC package), composed of one big matrix, and two genomicRanges objects, A and B which describe the matrix raws and columns.
I thinking about a way to decrease the memory size of this object.
I also have methods to  get/set the matrix and the two GRanges, namely intdata(), x_intervals(), y_intervals().

In case of symetric matrix, the two GRanges can be the same, so I was interested in simply creating in this case, a pointer from B to A. How can I do it in R please ??
Second, I'm wondering if it exists other matrix-like object optimized for big matrix (5000 x 5000). I quicky saw the Matrix object from the CRAN, useful for sparse matrix.
Any suggestion would be appreciated !

Thank you
Regards
Nicolas

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