Thanks, Tim, that is really cool. I know there must be some convenient way of doing this.
--- Tim Hochberg <[EMAIL PROTECTED]> wrote: > Anthony Liu wrote: > > I am talking about the 'take' method of numarray. > > > > See here for more info: > > > > http://stsdas.stsci.edu/numarray/Doc/node33.html > > > > If I initialize a matrix 'mymatrix' by > zeros((3,3), > > type="Float64"), I get a 3*3 matrix of all zeros. > > > > Look: > > > > > >>>>from numarray import * > >>>>mymatrix = zeros((3,3), type="Float64") > >>>>mymatrix > > > > array([[ 0., 0., 0.], > > [ 0., 0., 0.], > > [ 0., 0., 0.]]) > > > > > > I want to change the zeros of only the first > column to > > 1's. In other words, I want to get: > > > > array([[ 1., 0., 0.], > > [ 1., 0., 0.], > > [ 1., 0., 0.]]) > > > > The 'take' method is able to take out the first > > column, but I am not sure if there is a good way > of > > changing all values of the first column to 1's. > > > > Of course, I know that I can achieve my goal > pretty > > easily with this: > > > > for i in range(3): mymatrix[i,0] = 1.0 > > > > I am just wondering if there is an existing > numarray > > method that elegantly does it for me. > > mymatrix[:,0] = 1.0 > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > -- > http://mail.python.org/mailman/listinfo/python-list > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://mail.python.org/mailman/listinfo/python-list
