I have a 200x12 matrix, with hours, minutes, seconds info. Each row has a time format like this: "13:35:43,050", but each column is composed of a single character of the time format ("1" in column 1; "3" in column 2; ":" in column 3, etc). I would like to end up with a 200x1 matrix, where all the column characters would appear in a single column, with no spaces. Can you help me, please? Thank you very much.