Perl PDL : How to change an value in a matrix

Question

I want to change a value in a PDL matrix :

ex :

my $matrix= pdl [[1,2,3],[4,5,6]];
$matrix->at(0,0)=0;

But this is not working...

Thank you for your help

Answer 1

Here is one approach using range and the .= assignment operator :

my $matrix= pdl [[1,2,3],[4,5,6]];
print $matrix;
$matrix->range([0,0]) .= 0;
print $matrix;

Output:

[
 [1 2 3]
 [4 5 6]
]

[
 [0 2 3]
 [4 5 6]
]

Here is a recent quick introduction to PDL.