How to keep rows including a specific name in structure and remove everything else within the structure?

Question

Wolfgang McCormack 2021-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/772038-how-to-keep-rows-including-a-specific-name-in-structure-and-remove-everything-else-within-the-struct

回答： Walter Roberson 2021-3-14

Hi all,

I have a shape file (shp) that is read as a structure within MATLAB. It is a 2540x1 struc in the worksapce. One of its columns is character type. chr. I want to find a few names in it like 'Malta', keep the entire row that includes the Malta and then remove all other rows. Could you please teach me how to do that?

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Jan 2021-3-14

Please post a short example of how your data look like. I do not understand "One of its columns is character type. chr." Structs do not have "columns".

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Answer 1

Walter Roberson 2021-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/772038-how-to-keep-rows-including-a-specific-name-in-structure-and-remove-everything-else-within-the-struct#answer_647203

在 MATLAB Online 中打开

placenames = {YourStruct.PlaceNameField};
wanted_mask = ismember(placenames, {'Malta', 'Paraguey', 'Lake Wawa'});
selected_members = YourStruct(wanted_mask);