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Extract all columns from a table where the column names "start with" a string

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newbie9
newbie9 2019-8-28
评论： Walter Roberson 2022-5-27
How can I extract all columns from a table where the column names "start with" a string?
For example, in
mytable = array2table(NaN(4,5));
mytable.Properties.VariableNames = {'A1', 'A2', 'B1', 'F2', 'F4'};
How would I extract all the "F*" columns in to a new table?

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采纳的回答

Walter Roberson
Walter Roberson 2019-8-28
mask = startsWith( mytable.Properties.VariableNames, 'F');
Fcols = mytable(:,mask);

更多回答（1 个）

Arnaud Delorme
Arnaud Delorme 2022-5-27
编辑：Arnaud Delorme 2022-5-27
colNames = fieldnames(mytable);
[~,inds] = intersect(colNames, { 'A1' 'A2' } );
mytable = mytable(:,sort(inds));
  1 个评论
Walter Roberson
Walter Roberson 2022-5-27
This would not get you anything that mytable(:, { 'A1' 'A2' } ) would not give, other than preserving relative order of variables.

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