Combine Strrep in one Line.
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Hi, is there any way that i Combine strrep as one line in my Code for different values. for example.
a = strrep(a, 'x','y'); a = strrep(a, 'z','w');
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Accepted Answer
KL
on 30 Nov 2017
use replace with cell arrays,
a = 'abcxyz'
old = {'x';'z'};
new = {'y';'w'};
a = replace(a, old,new)
3 Comments
KL
on 30 Nov 2017
sorry, that does not work for me
What does it mean? Do you get an error message?
My guess would be that you're using a matlab version older than 2016b. Anywayt try regexprep,
a = regexprep(a, old,new);
More Answers (1)
Jan
on 30 Nov 2017
Edited: Jan
on 30 Nov 2017
has = 'xy';
rep = 'zw';
[Lia, Locb] = ismember(a, has);
a(Lia) = rep(Locb);
[EDITED] I assume strrep has less overhead. For many changes, a lookup table will be more efficient:
function s = StrRepList(s, old, new)
if numel(old) < 20 % GUESSED limit!
for k = 1:numel(old)
s = strrep(s, old(k), new(k));
end
else
lut = char(0):char(255);
lut(old + 1) = new;
s = lut(s + 1);
end
end
Some tests with tic/toc will help to find a suitable limit to decide for a strrep loop or a lookup table method. Maybe it depends on the size of s also.
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