Keeping the rows in an array with specified numbers
显示 更早的评论
I want to keep the part of the array with specified numbers in column 2. This deletes the rows in the array with the specified numbers in column 2, but how do I do the opposite (keep all rows where the numbers 5 or 6 are in column 2)?
numbersTokeep = [5,6];
A = magic(5);
for n = numbersToKeep
A((A(:,2) == n),:) = [];
end
采纳的回答
numbersTokeep = [5,6];
A = magic(5);
disp(A);
% keep rows where column 2 is 5 or 6:
A = A(ismember(A(:,2),numbersTokeep),:);
disp(A);
A = magic(5);
% or, delete rows where column 2 is not 5 or 6:
A(~ismember(A(:,2),numbersTokeep),:) = [];
disp(A);
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Cell Arrays 的更多信息
Translated by 
