how do I convert all capital letters in a string to lowercase and add a space before them?

Question

Sara 2012-12-18

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https://ww2.mathworks.cn/matlabcentral/answers/56874-how-do-i-convert-all-capital-letters-in-a-string-to-lowercase-and-add-a-space-before-them

I have a function that turns the input variable into a plot legend and output filename:

axisLabelInput               = inputname(3);
labelInput                   = strrep(axisLabelInput,'_',' ');
legend(['Range at ' labelInput]);
print(gcf, '-depsc', '-r300', labelInput);

but this only works when the input variable is in the format input_var_1. It is far more common for the input variables to be in a different format, eg inputVar1, which looks awful in a legend entry. How can I modify my code to find all capital letters in my desired input variable, and make them lowercase and add a space beforehand, so that my legend and file output still make sense?

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Answer 1

TAB 2012-12-18

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https://ww2.mathworks.cn/matlabcentral/answers/56874-how-do-i-convert-all-capital-letters-in-a-string-to-lowercase-and-add-a-space-before-them#answer_68816

在 MATLAB Online 中打开

Mystr = 'ABCDEF';
MystrLower = lower(Mystr);
MystrLowerWithSpace = [' ' MystrLower];
%---------OR----------
% In 1 line
MystrLowerWithSpace = [' ' lower(Mystr)];

See lower

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Sara 2012-12-18

编辑：Sara 2012-12-18

在 MATLAB Online 中打开

Actually, I accepted that answer too soon. Sorry for not being clear, what I meant was that I wanted to put a space before every letter that had previously been capitalized. So if the input was:

inputVarOne

then the converted value would be

input var one

but the rest is perfect, thanks.

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