Removing columns containing zeros

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Oliver Vavasour
Oliver Vavasour 2016-4-27
回答： Andy 2018-5-20
I have a 2x500 matrix containing data. Some columns contain only zeros and I need to remove these (forming, say, a 2x460 matrix when 40 columns contained zeros).
Similar questions have been asked and answered about cell arrays which give commands such as:
m = m(cellfun(@ischar,m(:,1)),:);
These commands produce the error 'Input #2 expected to be a cell array, was double instead' when I use my matrix in place of 'm'

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采纳的回答

Torsten
Torsten 2016-4-27
m=m(:,any(m))
Best wishes
Torsten.

更多回答（1 个）

Andy
Andy 2018-5-20
If you've got a table w/ various variable names that you want to keep, you might do:
function pTable = aRemoveZeroTableColumns(primersTable)
%
%
%
pTable = primersTable;
indexes = [];
for i = 1:numel(primersTable.Properties.VariableNames)
column = primersTable{:,i};
if all(column == 0)
indexes = [indexes, i];
end
end
pTable(:,indexes) = [];
end

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