How can I split a string and assign new values to the strings?

natoLookup = {'h','Hotel-';
              'e','Echo-';
              'l','Lima-';
              'o','Oscar-';
              };
replace(lower('Hello'), natoLookup(:, 1), natoLookup(:, 2))

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the cyclist 2017-1-9

Oooh, nice!

Please unaccept my answer and accept this one!

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Answer 2

the cyclist 2017-1-9

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319640-how-can-i-split-a-string-and-assign-new-values-to-the-strings#answer_249888

编辑：the cyclist 2017-1-9

在 MATLAB Online 中打开

Here is one way:

natoLookup = {'h','Hotel-';
              'e','Echo-';
              'l','Lima-';
              'o','Oscar-';
              };
str = 'Hello';
newstr = '';
for nc = 1:numel(str)
    [tf,loc] = ismember(lower(str(nc)),natoLookup(:,1));
    newstr = [newstr,natoLookup{loc,2}];
end
% Trim the excess hyphen
newstr(end) = [];

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Image Analyst 2017-1-9

If you modify natoLookup to include every character you want to replace (the whole alphabet plus symbols) and change str to be whatever word you want to operate on, then it will be completely general.

the cyclist 2017-1-9

As @ImageAnalyst states, it will be general after you generalize the lookup table.

One other quick comment: If you are planning to use this with very long text, it would be best to modify this code to preallocate memory for newstr. The current algorithm will manage memory poorly.

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Answer 3

Stephen23 2017-1-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319640-how-can-i-split-a-string-and-assign-new-values-to-the-strings#answer_249898

编辑：Stephen23 2017-1-9

在 MATLAB Online 中打开

Using indexing means no loops and a very memory-efficient method:

>> str = 'Hello World!';
>> tmp = num2cell(str);
>> idx = isletter(str);
>> C = {'Alpha', 'Bravo', 'Charlie', 'Delta', 'Echo', 'Foxtrot', 'Golf', 'Hotel', 'India', 'Juliet', 'Kilo', 'Lima', 'Mike', 'November', 'Oscar', 'Papa', 'Quebec', 'Romeo', 'Sierra', 'Tango', 'Uniform', 'Victor', 'Whiskey', 'Xray', 'Yankee', 'Zulu'};
>> tmp(idx) = strcat(C(1+upper(str(idx))-'A'),'-');
>> [tmp{:}]
ans = Hotel-Echo-Lima-Lima-Oscar- Whiskey-Oscar-Romeo-Lima-Delta-!

Or with a bit of attention to the hyphens:

>> D = {'','-'};
>> idy = idx & [idx(2:end),false];
>> tmp(idx) = strcat(C(1+upper(str(idx))-'A'),D(1+idy(idx)));
>> [tmp{:}]
ans = Hotel-Echo-Lima-Lima-Oscar Whiskey-Oscar-Romeo-Lima-Delta!