How to keep certain numbers in a cell array?
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Lets say for example I have a cell array A = {1,2,3},{4,5,6},{7,8,9},{10,11,12}. I am then given the string B = [1,3,5,12]. How would I create an output cell array where the numbers which were not mentioned in the string B were removed? i.e ans = {1,3} {5} {12}
Thank you for your time
Nabil
2 个评论
What have you tried so far? Which problems occur?
A = {1,2,3},{4,5,6},{7,8,9},{10,11,12}
This is not a cell array and no valid Matlab code. Please do not let use guess which input you have. Is this:
A = {[1,2,3], [4,5,6], [7,8,9], [10,11,12]}
or
A = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}}
?
Nabil Abdullah
2017-4-17
编辑：Nabil Abdullah
2017-4-17
采纳的回答
A = {{1,2,3},{4,5,6},{7,8,9},{10,11,12}};
B = [1,3,5,12];
R = cell(size(A));
for iA = 1:numel(A)
v = cat(2, A{iA}{:}); % A{iA} as vector
ex = ismember(v, B);
R{iA} = A{iA}(ex);
end
R = R(~cellfun('isempty', R));
Or:
R = cell(size(A));
iR = 0;
for iA = 1:numel(A)
v = cat(2, A{iA}{:}); % A{iA} as vector
ex = ismember(v, B);
if any(ex)
iR = iR + 1;
R{iR} = A{iA}(ex);
end
end
R = R(1:iR);
2 个评论
Nabil Abdullah
2017-4-18
编辑：Nabil Abdullah
2017-4-18
Jan
2017-4-18
To keep the empty matrix in the output, remove the "R = R(~cellfun(..." line from the 1st code. You can try by your own, if the code works for the wanted input.
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