different operations for same string

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Elie Elias
Elie Elias 2018-10-14
编辑： dpb 2018-10-15
lets say i have a string (string=('aBcdEf')). how do i make something like that?
output1= function on A to C (upper and lower case)
and
output2=function on D to F(upper and lower case)
Thank you
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madhan ravi
madhan ravi 2018-10-14
编辑：madhan ravi 2018-10-14
Just give an example of your required output
Image Analyst
Image Analyst 2018-10-14
Clear as mud. When you say "the next prime number"? What is the current prime number? And as you know, the only even prime number is 2, so the next prime number being even would only be if the CURRENT prime number is 1, but we don't even know how you're obtaining any of these these prime numbers.
Try to read this link

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dpb
dpb 2018-10-14
编辑：dpb 2018-10-15
Sounds pretty French to me! :)
function s=strfutz(s)
% futz with characters in string
% generate the test prime set
%P=primes(200);P=P(find(P<'A',1,'last'):find(P>'z',1));
P=[61 67 71 73 79 83 89 97 101 103 107 109 113 127];
isOdd=@(x) logical(mod(x,2)); % convenient shorthand
isEven=@(x) ~isOdd(x);
u=upper(s);
ix=ismember(u,'A':'M'); % first group
ix=find(ix); % absolute address in string
io=isOdd(interp1(P,P,double(s(ix)),'next')-s(ix));
ifix=ix(io); % pick the odd ones out
s(ifix)=s(ifix)+1; % and increment the ASCII code
ie=~io; % even aren't odd
ifix=ix(ie); % pick the even ones now
s(ifix)=s(ifix)+2; % and increment the ASCII code
end
Some of the intermediaries could be fold together, but I believe this does what your description asks for.

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