IsMatrix

IsMatrix — Check whether list value is a matrix.

IsMatrix ListValue

Return Value

1	Value is a matrix.
0	Value is not a matrix.

Arguments

ListValue

List to check whether it forms a matrix.

More Info

Here we mean matrix to be a list where every element is also list and all of them have the same length. It is like a table but we use the term matrix to make it clear we are not talking about a database table.

Note that we do consider the empty string to be a valid matrix (0x0).

For fully-featured matrix packages, you may want to check out matrix and report.

For information regarding exceptions / errors, see here.

% set MyMatrix {{1 2 3} {4 5 6} {7 8 9}}
{1 2 3} {4 5 6} {7 8 9}
% IsMatrix $MyMatrix
1

% set NotMatrix {1 {2 2} {3 3 3}}
1 {2 2} {3 3 3}
% IsMatrix $NotMatrix
0