Filter contents of a table

Question

Deepa Maheshvare 2019-12-7

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/495402-filter-contents-of-a-table

回答： dpb 2019-12-7

I've the following table

tbl = table(['1'; '2'; '3'; '4'; '5'; '6'],['1'; '3'; '2'; '2'; '4'; '1'],'VariableNames', {'name', 'value'})

I would like to filter rows that don't have 'value' 3 and 4.

Expected result:

tbl = table(['1';  '3'; '4'; '6'],['1'; '2'; '2';'1'],'VariableNames', {'name', 'value'})

Any suggestions on how this can be done?

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Answer 1

dpb 2019-12-7

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/495402-filter-contents-of-a-table#answer_405299

在 MATLAB Online 中打开

Why are numeric values entered as text/characters?

ix=~ismember(str2num(tbl.value),[3 4]);
tbl=tbl(ix,:);

If the real question is for table that is using nonnumeric character data, then use one of the string search functions instead. For the actual question, I'd strongly suggest either build the table as numeric to begin with or immediately convert to double.