Elements in a matrix

Hello,

When I have a certain matrix, is there a possibility to check whether some value is on more than one position in the matrix.

So for example the identity matrix 3-by-3, how can I check whether the value '1' is multiple times there in the matrix?

Thanks in advance.

Answer 1

[Azzi Abdelmalek]

Idx=find(A==1)

Answer 2

[Walter Roberson]

sum(TheMatrix(:) == TheValue) > 1

In the more general case where you want to know whether any value is repeated, see unique()

Answer 3

[Maik Petersen]

You guys are great, thanks!