strcmpi
strcmpi(str1,str2) returns 1 (true) if string str1 is identical to str2 and 0 (false) otherwise, ignoring case. Arguments can also be cell array of strings.
Examples
> strcmpi('Abc','abc')
[ans:true]
> s1 = 'ABCD'; s2 = {'AB' 'ABCD';'ABC' 'ABCd'};
[s1:ABCD]
[s2:2x2 cell]
> strcmpi(s1,s2)#
0
0
1
1