telek...@hotmail.com wrote:
Hello to all!!I am new in python, and I am running it on Mac with Smultron editor. I need to read a textfile that includes numbers (in a matrix form), indexes, and strings, like this: Marsyas-kea distance matrix for MIREX 2007 Audio Similarity Exchange Q/R 1 2 3 4 5 1 0 4.54592 4.36685 5.29463 3.85728 2 4.54592 0 3.97667 5.02151 4.64284 3 4.36685 3.97667 0 4.98743 4.83683 4 5.29463 5.02151 4.98743 0 6.04393 5 3.85728 4.64284 4.83683 6.04393 0 My code to get this information is: matrix = open("dmatrix_5.txt"); while 1: mat = matrix.readline() if not mat: break pass # do something print mat So I just want to keep the matrix in the "middle" for math computations. 0 4.54592 4.36685 5.29463 3.85728 4.54592 0 3.97667 5.02151 4.64284 4.36685 3.97667 0 4.98743 4.83683 5.29463 5.02151 4.98743 0 6.04393 3.85728 4.64284 4.83683 6.04393 0 I've seen and tried a lot of ways, like split or isinstance.. but never get the wanted result.... does anyone have an idea, or hint? Thank you once more for your help! Best Regards, Bea
numpy provides an answer. See the little script below: import numpy as _n import string as _s a= "0 4.54592 4.36685 5.29463 3.85728 " + \ "4.54592 0 3.97667 5.02151 4.64284 " + \ '4.36685 3.97667 0 4.98743 4.83683 ' + \ '5.29463 5.02151 4.98743 0 6.04393 ' + \ '3.85728 4.64284 4.83683 6.04393 0' d= _n.mat(_n.reshape(_n.array(a.split(), dtype= _n.float), (5, 5))) print repr(d) print 'Default printoptions:', _n.get_printoptions() for p in range(9): _n.set_printoptions(precision= p) print 'precision= ', p, '\n', d When you run this, you'll see that there is a numpy glitch for precisions > 5. Colin W. -- http://mail.python.org/mailman/listinfo/python-list
