Find position of specific digit in a number

Hi,

I have A = [123; 312]. How can I find the position of the digit 3 in each element of A? That is, I want B = [3; 1].

Any help would be appreciated.

IP

[Adam Danz]

What should happen if A contains 333 or 102?

Answer 1

[Walter Roberson]

A = [123; 312]

A = 2×1

123 312

B = cell2mat(strfind(string(A), '3'))

B = 2×1

3 1

This will fail if any entry does not have exactly one 3. And watch out for floating point data, string() will round it.

[Inna Pelloso]

Thank you! Also, thank you for all the great insight and answers in the forum over the years, too!