How to filter multiple columns with conditions

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Jana Sarran 2023-4-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1939924-how-to-filter-multiple-columns-with-conditions

评论： Peter Perkins 2023-4-5

采纳的回答： Walter Roberson

I am trying to filter column 4 and column 6 of the table below:

I am using the "find" function - DV1 = find((DV.Veh1Type == 630) & (DV.Veh1Type == 640) & (DV.Veh2Type == 640) & (DV.Veh2Type == 630) ) but my cell is a 0×1 empty double column vector.

Can someone assist me with advice on a function that can be used to filter those columns so that only the vehicle type with number 630 and 640 remains in both columns?

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采纳的回答

Walter Roberson 2023-4-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1939924-how-to-filter-multiple-columns-with-conditions#answer_1207099

在 MATLAB Online 中打开

row_is_selected = ismember(VD.Veh1Type, [630 640]) & ismember(VD.Veh2Type, [630 640]);
subset = DV(row_is_selected, :);

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Jana Sarran 2023-4-3

Thank you! This code worked.

Peter Perkins 2023-4-5

In other words, some of those &'s needed to be |'s. Which is what ismember does.

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