On Thu, Aug 7, 2008 at 1:36 PM, Simon Parker <[EMAIL PROTECTED]> wrote: > Hello. > > I want to be able to create a 2D character matrix, ThisMatrix, like : > > > a A > b B > c C > d D > > and to be able to pick out elements, or rows or columns. > > I have become used to programming in R where I can easily refer to a row as > : > > ThisMatrix [1,] > > and a column as > > ThisMatrix[,1]. > > etc.. > > Can this be done easily in Python ? > >
You can use numpy: http://www.scipy.org/NumPy for example: In [139]: arr = numpy.char.array(['a', 'A', 'b', 'B', 'c', 'C']) In [140]: arr = arr.reshape((3,2)) In [141]: arr Out[141]: chararray([['a', 'A'], ['b', 'B'], ['c', 'C']], dtype='|S1') In [142]: arr[0,:] Out[142]: chararray(['a', 'A'], dtype='|S1') In [143]: arr[:,0] Out[143]: chararray(['a', 'b', 'c'], dtype='|S1') More documentation here: http://mentat.za.net/numpy/refguide/ or take a look at these pages for some quick examples of what's possible: http://pages.physics.cornell.edu/~myers/teaching/ComputationalMethods/python/arrays.html http://www.scipy.org/Numpy_Example_List_With_Doc -- http://mail.python.org/mailman/listinfo/python-list
