MATLAB: Remove the functionality of special characters

comment sign\MATLAB

I have a cell array that contains the '%' character

C = {000000020F0D0%, 0000000281830%, 0071803F01CF0%, 0071803F6AA40%};

the problem is that it commnets out everything after it. How do I avoid this?

Best Answer

What do you think the % symbol does in MATLAB? Answer: when not inside quotes (so a string) it creates a comment.

What do either of these strings of characters mean in MATLAB?

000000020F0D0

000000020F0D0%

Answer: Essentially nothing. It is just a list of characters. Inside a cell array as you are trying to put it, they do not even form a valid MATLAB syntax.

I might guess that perhaps you want them to be strings of some ilk, representing whatever it is you want them to mean, thus:

C = {'000000020F0D0%', '0000000281830%', '0071803F01CF0%', '0071803F6AA40%'};

But as you want to create that cell array, it is just a syntax error waiting to happen.

You cannot arbitrarily turn off the functionality of a % in MATLAB, any more than you can hope that MATLAB will know what it is that you might want MATLAB to do with that statement.

Since you appear to be creating these statements, then you probably need to create them as strings, thus with enclosing quotes, IF you want to create them as cell arrays.

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you have to do array2{1}{1} to get that same 'a'

Yes, of course, because in the second case, you have a cell array of cell arrays of char array, not a cell array of char arrays. You get a cell array of cell arrayw because regexp can return multiple match for each cell of your orignal array. If you want to limit it to just one match (the first one if there are more than one possible), then tell regexp.

Note that your cellfun was completely unnecessary. regexp works directly with cell arrays, so instead of:

array = regexp(array, '.*', 'match');  %cellfun unnecessary

use

array = regexp(array, '.*', 'match', 'once');  %force only one output from regexp,

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V_AA = [100; 200]
L_AA = length(V_AA)
for i=1:L_AA
  F_AA{i} = sprintf('N°: %d', V_AA(i))
end

%or without for loop

F_AA=regexp(sprintf('N°: %d ', V_AA'),'N°: \d+','match')

Best Answer

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