Splitting a cell array of multi-word strings into a cell array of single-word strings

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I have a cell array of multi-word strings that is very long (many tens of thousands of cells) that I want to split into a cell array of single-word strings. Is there a way to do this without combining the split function and a for loop?
Currently, I am doing the following:
CellStrings = {'Here is my First String';'Now a second string';'And here is a third'}
SingleColumnStrings = {};
for i = 1:length(CellStrings)
temp = split(CellStrings(i));
SingleColumnStrings = [SingleColumnStrings; temp];
clear temp
end
clear i
When CellStrings gets large, this for loop takes forever. Is there a way to do this as a matrix/vector operation?
Thanks in advance.
  1 Comment
Guillaume
Guillaume on 3 Feb 2020
Note that clear is rarely needed. clear inside a loop is a particularly bad idea and will slow the loop for no useful purpose.

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Accepted Answer

fred  ssemwogerere
fred ssemwogerere on 3 Feb 2020
I think this can do nicely:
SingleColumnStrings=cellstr(strsplit(strjoin(string({'Here is my First String';'Now a second string';'And here is a third'})'))')
  1 Comment
Illan Kramer
Illan Kramer on 3 Feb 2020
That's perfect! My tic/toc runtime now for that operation has gone from over 50s to about 0.25s. Thanks so much! I actually just put the transpose on the outside of the entire right side of the equal sign instead of having 2 of them in there and it worked just as well.

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More Answers (1)

Guillaume
Guillaume on 3 Feb 2020
Edited: Guillaume on 3 Feb 2020
Possiblty more efficient than the accepted answer since it doesn't require concatenating strings to then split them again:
SingleColumnStrings = regexp(CellStrings, '\S+', 'match');
SingleColumnStrings =[SingleColumnStrings{:}].';
  2 Comments
Illan Kramer
Illan Kramer on 3 Feb 2020
This is also a great solution, thanks! Comparing tic/toc runtimes, this one is 0.01s faster than the accepted answer. I will luxuriate in all of my new spare time upon deploying this solution going forward.

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