I just started to learn some python today for first time, so be easy on me.
I am having some trouble figuring how do the problem shown in this link http://12000.org/my_notes/mma_matlab_control/KERNEL/KEse44.htm Given 4 column vectors, v1,v2,v3,v4, each is 3 rows. I want to use these to construct matrix mat, which is [[v1,v2], [v3,v4]] So the resulting matrix is as shown in the link. i.e. it will be 6 rows and 2 columns. This is what I tried: import numpy as np v1=np.array([1,2,3]); v2=np.array([4,5,6]); v3=np.array([7,8,9]); v4=np.array([10,11,12]); And now I get stuck, I tried m=np.array([[v1,v2],[v3,v4]]) #no good Also m=np.array([v1,v2,v3,v4]) m.shape Out[153]: (4L, 3L) m.T array([[ 1, 4, 7, 10], [ 2, 5, 8, 11], [ 3, 6, 9, 12]]) Not what I want. I need to get the shape as in the above link, 6 rows by 2 columns, where each column vector is stacked as shown. I also tried v1=np.array([1,2,3]); v1.shape=3,1 v2=np.array([4,5,6]); v2.shape=3,1 v3=np.array([7,8,9]); v3.shape=3,1 v4=np.array([10,11,12]); v4.shape=3,1 mat=np.array([[v1,v2],[v3,v4]]) What is the correct way to do this in Python? thanks, --Nasser -- https://mail.python.org/mailman/listinfo/python-list
