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How to check for empty matrix, scalar and vector without builtin functions

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Millone
Millone 2015-4-26
评论： Star Strider 2015-4-26
I am lost on this. How do I check for empty matrix, scalar or vector without using these builtin functions: isempty, isscalar, and is vector?
Some help will be appreciated.
Thanks

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Star Strider
Star Strider 2015-4-26
Using the size function is an option:
x = []
sx = size(x)
produces:
x =
[]
sx =
0.0000e+000 0.0000e+000
Since this seems to be a homework assignment, I leave the rest to you.

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