Creating a random string of special characters and operators

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Yusuf Oguzhan Turgut 2018-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/437627-creating-a-random-string-of-special-characters-and-operators

评论： Image Analyst 2018-12-29

Hello,

I'm new in Matlab. I want to generate a random string that created by only special characters and operators. It won't include number or letter. For example, The generated random string will be like: [\-:/ I cannot create it

How can I generate it ?

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Answer 1

Image Analyst 2018-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/437627-creating-a-random-string-of-special-characters-and-operators#answer_354360

在 MATLAB Online 中打开

Here is one way, if you want to specify the operator characters in advance:

% Define acceptable operators in advance.
operators = {'+', '-', '/', '*'};
% Get 14 random indices from that list.
indexes = randi(length(operators), 1, 15)
% Get a new character array with those characters in it.
s = cell2mat(operators(indexes))

and you'll get

s = '*--++**-+-**/**'

Otherwise you can define an ASCII range of characters:

% Define acceptable operators in advance.
operators = 31:47;
% Get 35 random indices from that list.
indexes = randi(length(operators), 1, 35)
% Get a new character array with those characters in it.
s = char(operators(indexes))

and you'll get

s = '/#/$"*/) %!".,%-+)%% $(&)', &)")('

adapt as needed.

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Jan 2018-12-29

在 MATLAB Online 中打开

@Yusuf: See:

char(31:47)

This is the list of ASCII values of the characters treated as "operators".

Image Analyst 2018-12-29

Not all of them are MATLAB operators like *, +, /, and -. Some of them are "special characters" which is also what you said you wanted. Aren't all characters up to ASCII 48 or '0' except for 32 which is the space "special characters" and a subset of those are MATLAB mathematical operators. If you want to specify exactly what characters you want to use, then use the first way I showed.

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