Can anyone help with code for this problem

How do you write code to find row/column of first time a number appears in matrix

Eg for [ 1 2 2; 3 3 5;6 6 7; 5 3 3;4 5 4]

The first time 4 appears is in the first column of the fifth row. Is there a way to code for this to solve this in a massive matrix?

Answer 1

[Walter Roberson]

unique() with first and second outputs and 'first' option.

The first output will be a list of values. The second will be the corresponding linear index.

You might want to ind2sub() the linear indices.