November 2017 - cctbxbb - phenix-online.org

rotate_translate_map function causes "splinching"
by Pearce, N.M. (Nick) 29 Nov '17

29 Nov '17

Hi all, I’m having a problem with the rotate_translate_map function from cctbx.maptbx. I have a 3D array (a mask of 0s and 1s, in this case) that I’m writing as a CCP4 map file. If I write it out “on the origin” (without running rotate_translate_map), then it’s fine (see attached “before.png”). However, if I apply the rotate_translate_map function and then write it out, odd features appear at the edge of the unit cell (see “after.png”). It is NOT the case that the map is going through the “periodic boundary conditions” of the unit cell (the shift is less than one unit cell, as shown by the structure which is transformed by the same amount). The minimal code is: ——————————— array = cctbx.maptbx.rotate_translate_map( unit_cell=self.unit_cell(), map_data=array, rotation_matrix=scitbx.matrix.rec([1,0,0,0,1,0,0,0,1], (3,3)).elems, translation_vector=(-1.0*scitbx.matrix.rec((X,Y,Z), (3,1))).elems ) # Write the map iotbx.ccp4_map.write_ccp4_map( file_name=f_name, unit_cell=self.unit_cell(), space_group=self.space_group(), map_data=array, labels=flex.std_string(['’]) ) ——————————— where (X,Y,Z) is a tuple for the origin shift. Is there something stupid that I’m missing? Has anyone else had the same problem? The only code for a rotate_translate_map function I could find was actually in maptbx/average_densities.h and I couldn’t see anything obviously “wrong”… though I’m not that familiar with C++. The maps and files can be found at https://www.dropbox.com/sh/xqrsk5lcn603416/AABiVO74g6A_jZMGn_DjxOmka?dl=0 all “grid” files are without translation, and all “ref” files are after translation. both are written out exactly the same (the iotbx.ccp4_map call above). I’m using the cctbx bundled with a ccp4 nightly from 2016-10-22. Thanks, Nick [cid:[email protected]][cid:[email protected]]

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cctbx versions causing indentation crash?
by Magnus Andersson 10 Nov '17

10 Nov '17

Hi all, I have a script that runs fine on my old computer, but crashes on my new computer with the error message: IndentationError: unexpected indent This script is (amongst other things) calling the softwatre Coot such as: subprocess.call(["""coot --no-graphics<<end/n (handle-read-draw-molecule-with-recentre \""""+str(inf)+"""\" 1) (set-refinement-immediate-replacement 1) (set-refine-max-residues 40) (regularize-zone 0 \" \" """+str(res1-2)+""" """+str(res3)+"""\" \") (accept-regularizement) (regularize-zone 0 \" \" """+str(res3)+""" """+str(res2+2)+"""\" \") (accept-regularizement) (write-pdb-file 0 \""""+str(outf)+"""\") (coot-real-exit 0)"""], shell=True) which is ok on my old system. I am trying to find the most likely source of this error. Here are the differences: - OLD cctbx = uses Python 2.7.10, NEW cctbx 2.7.14 - OLD OSX = 10.10.5 (i.e. Yosemite), NEW OSX = 10.11.5 (i.e. El Capitan) - OLD Coot = vers 0.8, NEW Coot = vers 0.8.8 [old Coot install was from Fink but this shouldn’t matter I think] Perhaps someone has encountered something similar or has an educated guess on whether different cctbx versions can cause such errors? Thanks, Magnus #### Magnus Andersson, Docent, Ph.D. Email: magnus.andersson(a)scilifelab.se Phone: 0769469872 Mailing address: Science For Life Laboratory Alpha 6 Box 1031 171 21 Solna Visiting address: Tomtebodavägen 23A 171 65 Solna

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scipy module
by Magnus Andersson 06 Nov '17

06 Nov '17

Hello, I am not normally using cctbx but I’m trying to run a script that imports modules as follows: import sys,io,os import subprocess import numpy import pickle import math import pylab #import pymol import time import scipy import iotbx.pdb import cctbx import mmtbx.model from scipy.optimize import fmin, fmin_cg, leastsq from scipy.interpolate import interp1d import datetime from numpy.random import random_sample from cctbx.array_family import flex from scitbx.math import superpose I have installed cctbx and run with cctbx.python. How can I import scipy into the cctbx python? Cheers, Magnus #### Magnus Andersson, Docent, Ph.D. Email: magnus.andersson(a)scilifelab.se Phone: 0769469872 Mailing address: Science For Life Laboratory Alpha 6 Box 1031 171 21 Solna Visiting address: Tomtebodavägen 23A 171 65 Solna

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