Re: [ccp4bb] Fix cell dimensions

2013-11-19 Thread Tim Gruene
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Dear Niu, in XDS the respective keywords in XDS.INP are REFINE(IDXREF), REFINE(INTEGRATE) and REFINE(CORRECT). If you do not want the cell to be refined, you have to set all three keywords (i.e. ensure they are not commented out with a leading '!')

Re: [ccp4bb] Fix cell dimensions

2013-11-19 Thread Kay Diederichs
Dear Niu, concerning XDS: there is no way, using just XDS.INP, to force the IDXREF step to use a cell that is not compatible with the reflections that COLSPOT found. But I can think of two ways to reach your goal (even if I believe that crystallographically it makes no sense to ignore every

[ccp4bb] Fix cell dimensions

2013-11-18 Thread Niu Tou
Dear All, Does any one know how to strictly fix the cell dimensions during data processing? In HKL2000 there is only a keyword to define the longest vector. In XDS there is a option to input cell parameters, but sometimes the program would not follow the input values and switch back to the one it

Re: [ccp4bb] Fix cell dimensions

2013-11-18 Thread Andrew Leslie
Dear Niu, It depends on which part of processing you are referring to, i.e. the indexing step or the integration step. In MOSFLM there is no way to enforce cell dimensions during indexing, but providing there is an indexing solution that has cell dimensions close to the ones

Re: [ccp4bb] Fix cell dimensions

2013-11-18 Thread Andrew Leslie
Dear Niu, OK, I did not connect this with your earlier Email. If it is simply a case of halving one of the cell dimensions, this can be done with iMosflm by editing the cell dimensions that come from the indexing step. This will not affect the positions of the predictions, but

Re: [ccp4bb] Fix cell dimensions

2013-11-18 Thread Matthew Franklin
Hi Niu - In HKL2000, you should first get an indexing solution with the 40 A axis, as you have done previously. Then go to the tab of the GUI labeled Macros. In the bottom row, Immediate Execution, you enter the following: unit cell a b c alpha beta gamma where you replace the words