Calculating the value, excluding nan
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I was calculating the average stock return of each year using the following code, and it shows error. This is due to the nan value in the stock return column (column 7). I turned the nan values to zero and it works.
However this will affect the result. I want to calculate only the data without the nan value (if the return is nan, exclude that row from calculation). How can I do that?
stockreturn(k-1992) = mean(data_crsp(y==k,7));
%1st element will correspond to 1993, 2nd - 1994 and so on
Steven Lord on 31 Jul 2022
Consider storing your data in a timetable array, with the dates associated with your data stored as a datetime array. If you do this, you can use the retime function to calculate the mean of the data, specifying the anonymous function @(x) mean(x, 'omitnan') as the 'Method' in your call.