2017-12-09 12:12:13 -0600 received badge ● Student (source) 2017-12-09 11:59:40 -0600 received badge ● Notable Question (source) 2016-11-27 00:08:38 -0600 received badge ● Popular Question (source) 2013-11-03 06:59:04 -0600 commented answer How to input data in SAGE and deal with them @ndomes, Thank you very very much!!! You answer is fabulous, I know how to do it now!!! 2013-11-03 05:24:30 -0600 marked best answer How to input data in SAGE and deal with them Copy and paste the data from "K3/3d" to a text file. Upload that file to your worksheet (I use Sage Notebook). (I name the file 'k3_d3_data.txt') Open the file in your worksheet. Now you can iterate through the lines and convert the appropriate lines to matrices. data_file = file(DATA+'k3_d3_data.txt','r') matrix_list = [] while True: try: data_file.next() except StopIteration: break row1 = [int(z) for z in data_file.next().split()] row2 = [int(z) for z in data_file.next().split()] row3 = [int(z) for z in data_file.next().split()] matrix_list.append(matrix(ZZ,[row1,row2,row3])) for M in matrix_list: print M  2013-11-03 05:24:30 -0600 received badge ● Scholar (source) 2013-11-03 05:24:22 -0600 received badge ● Supporter (source) 2013-11-02 15:25:05 -0600 received badge ● Editor (source) 2013-11-02 15:20:45 -0600 asked a question How to input data in SAGE and deal with them I wish to calculate the width of the certain polytopes, the data for these polytopes can be found here (please click "K3/3d" on the left, and then click "list of all 4319" on the top of new page, for some reason, I could not cite the exact URL). For example, the first one is 3 4 M:5 4 N:35 4 Pic:19 Cor:0 1 0 0 -1 0 1 0 -1 0 0 1 -1  However, only the number in the matrix will be used in the calculation. My questions are: (1) How to input these data in SAGE (I use a windows system, and run Virtualbox for SAGE)? (2) How to use sage to deal with each matrix? For each of matrix, I have a program as the follows sage: m = matrix(ZZ, [[1,0,0,-1], ....: [0,1,0,-1], ....: [0,0,1,-1]]) sage: p = LatticePolytope(m) sage: d = p.distances() sage: l = p.nfacets() sage: for i in range(l): ....: max(d.row(i))  After input the data, how to let sage use the same program deal with each matrix? Thank you very much for your help!!!