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Topic: [Axiom] matrix element access
Replies: 3   Last Post: Aug 13, 2017 10:30 AM

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Posts: 59
Registered: 11/11/16
[Axiom] matrix element access
Posted: Aug 13, 2017 5:28 AM
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a:=matrix[[i+j for i in 1..4] for j in 1..4]

One can access the element i,j with


But if i want a matrix of lists as
a:=matrix[[[i,j] for i in 1..4] for j in 1..4]

a(i,j) result to me can not return [i,j]

Where is the error? What does it mean "SUB"?

What about use as nxn matrix, list of list?

b:=[[[i,j] for i in 1..4] for j in 1..4]

here b.i.j return [i,j]

But if with list of list one can have matrix types, why define a new type Matrix?

Then i have the doubt it is better array start from 0 and not from 1
(but this can be always easy to solve)

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