how can i compare two string matrix with conditions ?

I want to compare two string matrix like a=[yes yes;no no] &b=[no yes;yes no] with conditions like if yes&yes=a;no&no=b;yes&no=c;no&yes=d..and i want to count no of common elements like 'no' (common in both matrix(a(2,2)&b(2,2)).

[Guillaume]

Please, use valid matlab syntax in your example (or accurate terms for what you describe). You cannot have a string matrix like: a=[yes yes;no no]

You could have a 2D char array (what you could call a string matrix)

a = ['yes' 'yes'; 'no ' 'no '] %note the extra spaces!

which is exactly the same as

a = ['yesyes'; 'no no '];

or you could have a 2D cell array of strings

a = {'yes' 'yes'; 'no' 'no'};

Your question about conditions is also not clear because again, you're not using syntax that makes sense.

Answer 1

[Stephen23]

>> a={'yes','yes';'no','no'};
>> b={'no','yes';'yes','no'};
>> X = strcmp(cat(3,a,b),'yes');
>> Y = 1 + diff(X,1,3) + 2*all(X,3)
Y =
   0   3
   2   1

Where 0=(yes,no), 1=(no,no), 2=(no,yes), 3=(yes,yes).

Answer 2

[Andrei Bobrov]

a={'yes' 'yes';'no' 'no'}
b={'no' 'yes';'yes' 'no'} 
aby = cellfun(@(x)strcmp(x,'yes'),a)
bby = cellfun(@(x)strcmp(x,'yes'),b)
a1 =  aby & bby
b1 = ~aby & ~bby
c = aby & ~bby
d = ~aby & bby

[Stephen23]

Note that cellfun is not required, as strcmp also works on cell arrays:

>> strcmp(a,'yes')
ans =
   1   1
   0   0

[Andrei Bobrov]

Thank you Stephen!