Capitalize / Capitalise first letter of every word in a string in Matlab?

Question

What's the best way to capitalize / capitalise the first letter of every word in a string in Matlab?

i.e.
the rain in spain falls mainly on the plane
to
The Rain In Spain Falls Mainly On The Plane

Answer 1

So using the string

str='the rain in spain falls mainly on the plain.'

Simply use regexp replacement function in Matlab, regexprep

regexprep(str,'(\<[a-z])','${upper($1)}')

ans =

The Rain In Spain Falls Mainly On The Plain.

The \<[a-z] matches the first character of each word to which you can convert to upper case using ${upper($1)}

This will also work using \<\w to match the character at the start of each word.

regexprep(str,'(\<\w)','${upper($1)}')

Answer 2

Since Matlab comes with build in Perl, for every complicated string or file processing tasks Perl scripts can be used. So you could maybe use something like this:

[result, status] = perl('capitalize.pl','the rain in Spain falls mainly on the plane')

where capitalize.pl is a Perl script as follows:

$input  = $ARGV[0];
$input =~ s/([\w']+)/\u\L$1/g;
print $input;

The perl code was taken from this Stack Overflow question.