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Reindex your data as -h -k l or h -k -l - this will automatically change the cell to berta = 90.4 eleanor On 06/08/2011 04:10 PM, Vellieux Frederic wrote: > Zhiyi Wei wrote: >> Dear all, >> >> I have a P2 derivative dataset with beta=89.6. I try to change the >> beta to 90.4 to be consistent with the native dataset. Should I do sth >> with the HKL, like applying a matrix? Thanks a million! >> >> Best, >> Zhiyi >> >> > Hi, > > Personally I would use sftools (no ccp4i GUI), to be run in a terminal > sftools > read mymtz.mtz > set cell > > [then you specify the new cell] > > write mynewmtz.mtz > stop > > However, before changing cell parameters I would think twice... Further, > each data set in an mtz file can have its own cell dimensions. > Differences in unit cell parameters of less that 1% (I think this is the > consensus) are still isomorphous, over this you have non-isomorphism. > There is a paper on this (Crick ?). > > Fred.