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How can i convert a string to a number? number_of_plots = '4' but i want 4 without ''

Tabel_Cell = table2cell(diagramoptions) ;
idx= strfind(Tabel_Cell(:,1), 'number_of_plots');
idx = find(not(cellfun('isempty',idx)));
number_of_plots = Tabel_Cell{idx,2}
%number_of_plots1=double(number_of_plots);
%number_of_plots1=str2num(number_of_plots);
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You can use str2num to convert strings to numbers.

If you want to convert them into floats rather use str2double which is faster (and safer) than str2num

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