I have a 2-column matrix: Column 1 has events (in the form of integers), column 2 counts how frequently those events occurred. I would like to turn this back into the raw data, effectively the inverse of tabulate(). I.e. turn [0 4; 1 2; 2 2; 3 1; 4 0] into [0 0 0 0 1 1 2 2 3]. Any ideas? Cheers.
Turning frequency table into raw data in matlab
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1 Answers
If you have
a = [0 4; 1 2; 2 2; 3 1; 4 0];
Then you can simply use the 2nd column as the number of repeats and the first column as the values for repelem
b = repelem( a(:,1), a(:,2) ).';
% >> b = [0 0 0 0 1 1 2 2 3]
With the .' as optional to transpose the result from a column to a row.
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