If you want to obtain the index of a specific value in your matrix, you can use the "find" function, which returns the indices of each entry that matches the specified value.
In your case you can use the below code to get the indices of values matching with "value" in column 1 of a matrix 'A'.
Indices = find(A(:,1) == value);
To get the corresponding values in column 3 in the matrix you can use:
col3Values = A(Indices, 3);
Please note that the "find" function returns a list of indices for all matching values. If you want to obtain only the first or last occurrence of a value, you can specify the direction using the 'first' or 'last' keyword.
kindly follow the documentation below for more information on "find" function:
Hope this helps!
