MATLAB: I want to make a full string from all the “a” values that i get

string

reversedDNA = 'TACATGA'
function complementedDNA = r_dnasepinaka(reversedDNA)
n=length(reversedDNA);
ok = num2cell(reversedDNA);
for i=1:n
a = ok{i};
for j = 1:length(a)
if a(j) == 'A';
a(j) = 'T';
elseif a(j) == 'T';
a(j) = 'A';
elseif a(j) == 'C'
a(j) = 'G';
elseif a(j) == 'G';
a(j) = 'C';
end
end
end

Best Answer

I am not completly sure I understood your question but you could do something like this:
reversedDNA = 'TACATGA'
function complementedDNA = r_dnasepinaka(reversedDNA)
    complementedDNA = reversedDNA;
    complementedDNA(reversedDNA == 'T') = 'A';
    complementedDNA(reversedDNA == 'A') = 'T';
    complementedDNA(reversedDNA == 'C') = 'G';
    complementedDNA(reversedDNA == 'G') = 'C';
end
and something like this to get all the As:
function [UniqueCharStr , PositionList] = getSingleChar(DNA , Char)
    PositionList = find( DNA == Char );
    UniqueCharStr = DNA( PositionList );
end
getSingleChar(reversedDNA , 'A')
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