MATLAB: Replacing character between square brackets

replace

A={'[ABC; DEF];[GHI; JKH];';  '[ZBC; YEF];[XHI; UKH];'}
I need to replace ";" only which are appearing within sqare brackets with "^"

Best Answer

>> A = {'[ABC; DEF];[GHI; JKH];';  '[ZBC; YEF];[XHI; UKH];'}
A = 
    '[ABC; DEF];[GHI; JKH];'
    '[ZBC; YEF];[XHI; UKH];'
>> B = regexprep(A,'(\[[^\]]+);([^\]]+\])','$1^$2')
B = 
    '[ABC^ DEF];[GHI^ JKH];'
    '[ZBC^ YEF];[XHI^ UKH];'
or perhaps:
>> B = regexprep(A,'(?<!\]);(?!\[)','^')
B = 
    '[ABC^ DEF];[GHI^ JKH];'
    '[ZBC^ YEF];[XHI^ UKH];'
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