Thank you Francois,

yes, indeed, gnuplot would do the job : what I am looking for is some type of tool in a program already designed to handle PDBs (so you can go easily and look at which atoms you're selecting, save vector coordinates with reference to selected unit cell parameters, etc) does the LS_plane command in moleman2 give this info implicitly? (it probably does, since it outputs the LSQ plane...but I can't figure out how to define the best line from there...)

Any help appreciated!

alejandro


Francois Berenger wrote:
Alejandro Buschiazzo wrote:
Dear all,

I know this can be done with any statistics program, or even by hand....but, just for practical reasons and having to deal with a bunch of pdb's, is there any (CCP4...or eventually other) program containing an embedded feature to calculate the best straight line fitting into a chosen set of atomic coordinates?

I am not sure this is the best tool for the job, but I guess
gnuplot can do this.

I also need to keep the information of the calculated vectors in a consistent, comparable way (wrt an orthogonal 3D reference, such as a reference unit cell)

Thanks for any help!








--
Alejandro Buschiazzo, PhD
Research Scientist
Laboratory of Protein Crystallography
Pasteur Institute of Montevideo
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URUGUAY

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