basis() and independent rows

06132015, 02:49 PM
Post: #1




basis() and independent rows
hi,
I saw that basis() returns results with little differences in Home and CAS (in CAS I ge an apparently matrix, but if I put in the command like it is set(mat), in Home I get the matrix with the results)... However, I need an idea to get from a matrix a list (other matrix, ok) with only the independent rows, using basis() or other commands... Any idea? An example: I've the matrix M1 = [[2,1,4], [1,2,5], [5,1,7], [0,2,4]] basis(M1) I get [[1,0,1], [0,1,2]] (rank of M1 is 2, I see that i.e. 2*[1 0 1] + [0 1 2] is [2 1 4], the 1st row (also rd row is 5*[1 0 1]+ [0,1,2]), than it is dependent, no good, and so on..., but not "manually" got... Only two rows are independent: 2, 4... Thank you in advance! Salvo ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

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basis() and independent rows  salvomic  06132015 02:49 PM

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