How can you display a null/empty matrix?

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Smith
Smith 2014-3-14
回答： Benjamin Avants 2014-3-14
is this a way? M = [ ] disp(M)

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Benjamin Avants
Benjamin Avants 2014-3-14
Your method won't display anything. You can remove the semicolon from the line that assigns a value to M and it will display like this:
M = []
M =
[]
If you want to test if it is empty use something like the following:
M = [];
if isempty(M)
disp('M is empty')
end

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