If you type m.<tab> you will see lots of things you can do with a matrix m. For example m.subdivide? allows you to pick out a submatrix.
The rest of your query is hard to interpret. To "create a list of equal elements", say a list of 5 copies of the matrix m, do this: sage: [m]*5 [[1.00000000000000 2.00000000000000] [3.00000000000000 4.00000000000000], [1.00000000000000 2.00000000000000] [3.00000000000000 4.00000000000000], [1.00000000000000 2.00000000000000] [3.00000000000000 4.00000000000000], [1.00000000000000 2.00000000000000] [3.00000000000000 4.00000000000000], [1.00000000000000 2.00000000000000] [3.00000000000000 4.00000000000000]] To add the entries of a vector: sage: v=vector(range(100)) sage: sum(v) 4950 I'll leave row sums of a matrix as an exercise! John Cremona 2008/9/23 aniura <[EMAIL PROTECTED]>: > > hi, > > I wanted to know if there is a way to work in Sage with arrays of > matrices or something similar (something like a[i,j,k], so that > a[i,:,:], a[:,j,:] and a[:,:,k] are all matrices. I tried to use a > list of matrices but apparently sage interprets it as a list of > vectors: > > sage: m=matrix(RR,2,range(1,5)) > sage: m1=matrix(RR,2,range(6,10)) > sage: lm=list(m) > sage: lm.append(m1) > sage: lm > > [(1.00000000000000, 2.00000000000000), > (3.00000000000000, 4.00000000000000), > [6.00000000000000 7.00000000000000] > [8.00000000000000 9.00000000000000]] > sage: lm[1] > (3.00000000000000, 4.00000000000000) > > I also wanted to know if there is a command to create a list (or > matrix, or vector) of equal elements; > to sum the entries of vectors, particularly of rows of matrices, > > thanks in advance, > > Aniura > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
