Replacing non-alphabetic characters with numbers?

Question

Andrew 2015-1-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/171212-replacing-non-alphabetic-characters-with-numbers

回答： Matz Johansson Bergström 2015-1-22

采纳的回答： Azzi Abdelmalek

Hello everyone,

I'm trying to solve a question and it's asking me to take the variable:

TS1='%@3Gb6'

and convert the non-alphabetic characters to zeros and the alphabetic characters with ones, saving the result as a new variable. Ideally I'm trying to get a new variable to saves as:

result=[0 0 0 1 1 0]

I would greatly appreciate the help on this issue.

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Answer 1

Azzi Abdelmalek 2015-1-22

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https://ww2.mathworks.cn/matlabcentral/answers/171212-replacing-non-alphabetic-characters-with-numbers#answer_165645

编辑：Azzi Abdelmalek 2015-1-22

在 MATLAB Online 中打开

out=zeros(size(TS1));
out(regexpi(TS1,'[A-Z]','start'))=1

%OR

str=['A':'Z' 'a':'z'];
out=ismember(TS1,str)

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Answer 2

Matz Johansson Bergström 2015-1-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/171212-replacing-non-alphabetic-characters-with-numbers#answer_165646

在 MATLAB Online 中打开

Yet another answer, just for the "cellfun" of it ;-)

tmp = cellfun(@(x) isstrprop(x, 'alpha'), {TS1}, 'UniformOutput', false); 
out = cell2mat(tmp)

First, check the property of each element (cellfun does this) of the cell array {TS1}, if 'alpha' then 1 otherwise 0. Then we need to convert to a matrix, which is a vector in this case. If you wish to sum the ones in the vector you might want to convert it to "double", it is logical now.