How to compare two strings with different sizes?

Hi everyone,

I would like to make a matrix by comparing 2 sequences with different dimensions, if it's same character (eg: A-A), it will be traced to 1, if not it will be traced to 0.

a = 'AAGCTACGC'

b = 'ACGCAA'

However, I have trouble to make this matrix. Honestly, I am a beginner, hope you guys will help me.

Thanks a lot.

[Jan]

What do you want to obtain as output for these inputs?

Answer 1

[Matt J]

Another guess:

a = 'AAGCTACGC';
b = 'ACGCAA';

match = ( a(:)==b )

match = 9x6 logical array
   1   0   0   0   1   1
   1   0   0   0   1   1
   0   0   1   0   0   0
   0   1   0   1   0   0
   0   0   0   0   0   0
   1   0   0   0   1   1
   0   1   0   1   0   0
   0   0   1   0   0   0
   0   1   0   1   0   0

[Thi Hong Loc Le]

I got it. Thank you

Answer 2

[Jan]

A bold guess:

a = 'AAGCTACGC'
b = 'ACGCAA'

Nmin = min(numel(a), numel(b));
Nmax = max(numel(a), numel(b));

match = false(1, Nmax);
match(1:Nmin) = (a(1:Nmin) == b(1:Nmin));

[Thi Hong Loc Le]

thanks