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

2012 12 18
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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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TAB
TAB 2012-12-18

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

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Sara
Sara 2012-12-18
编辑：Sara 2012-12-18
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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