how to filter data by date?

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Manny
Manny 2024-3-4
回答： Steven Lord 2024-3-4
hi everyone
I am trying to filter records by date. I am getting error. How do I fix it?
Code:
Data = convertvars(Data, 2, @(x) datetime(x, 'InputFormat', 'yyyy-MM-dd'));
FilteredDataRealizedVol = Data(:,["TRADE_DATE","REALIZED_VOLATILITY"]);
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol(:,1) <= datetime(2016,7,18),:);
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol(:,1) >= datetime(1928,1,27),:);
Error:
Error using <=
This operation is not defined between 'table' and 'datetime'. The input that is not a table or timetable must be a numeric or
logical array.
Error in LinearRegression (line 26)
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol(:,1) <= datetime(2016,7,18),:);
Thank you

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采纳的回答

Walter Roberson
Walter Roberson 2024-3-4
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol{:,1} <= datetime(2016,7,18),:);
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Manny
Manny 2024-3-4
i did put the {} but still not working:
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol{:,1} <= datetime(2016,7,18),:);
FilteredDataRealizedVol = FilteredDataRealizedVol(FilteredDataRealizedVol{:,1} >= datetime(1928,1,27),:);
Manny
Manny 2024-3-4
i figured it out now.
the problem was in another part of the code that was referencing the unfiltered data.
thank you everyone for your help!

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更多回答（1 个）

Steven Lord
Steven Lord 2024-3-4
Use a timerange to index into the timetable.

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