I'm reading a file which contains a grid definition. Each cell in the grid, apart from having an i,j,k index also has 8 x,y,z coordinates. I'm reading each set of coordinates into a numpy array. I then want to add/append those coordinates to what will be my large "points" array. Due to the orientation/order of the 8 corners of each hexahedral cell I may have to reorder them before adding them to my large points array (not sure about that yet).
Should I create a numpy array with nothing in it and then .append to it? But this is probably expensive isn't it as it creates a new copy of the array each time? Or should I create a zero or empty array of sufficient size and then put each set of 8 coordinates into the correct position in that big array? I don't know exactly how big the array will be (some cells are inactive and therefore don't have a geometry defined) but I do know what its maximum size is (ni*nj*nk,3). Thanks Brennan _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
