On Sat, Oct 11, 2008 at 2:16 PM, Linda Seltzer <[EMAIL PROTECTED]> wrote: > I would appreciate it if someone could answer my question without > referring to subjects such as APIs and interfaces, since I am only > concerned with a mathematical application at this time. > In most tutorials, array examples are of the form: > a = array([1, 2, 3], [4, 5, 6] ) > The problem with this is that I have an array of size 256 x 256, and I > have had applications with 3-d arrays of size 128x128x128. In video, you > can arrays such as 640x480, etc. So filling in the value of each element > is not practical. I wish that tutorials provided real world examples. > I would appreciate it if someone could give me the actual statements > needed to define and initialize a 2-D array of size NxN, where N can be > any large number, where the initial values of the array elements are all > zeros, but will be changed by the program. > In Matlab, this is done as a = zeros(256,256). If I try this in python, > it won't let the program overwrite the zeros.
In numpy it's import numpy as npy a = npy.zeros((256,256)) a[0,0] = 1.0 a[200,123] = -42.0 # etc... I think you were just missing the extra parentheses in the numpy version of "zeros" --bb _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
