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How to write if statement?

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Anne Nguyen
Anne Nguyen on 6 Oct 2019
Commented: Walter Roberson on 6 Oct 2019
How do I write an if statement saying if either input is a matrix, my program should throw a unique error message? (I cannot use isvector function, I think I am supposed to use length() or size() functions if that is possible). Thank you!

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Walter Roberson
Walter Roberson on 6 Oct 2019
How do you define matrix for this purpose? Which of these are a matrix ?
zeros(0,0)
zeros(0,1)
zeros(0,10)
zeros(1,0)
zeros(1,1)
zeros(1,10)
zeros(10,10)
zeros(0,0,0)
zeros(0,10,10)
zeros(10,0,10)
zeros(10,10,0)
zeros(1,10,10)
zeros(10,1,10)
zeros(10,10,1)
zeros(10,10,10)

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