R Programming: matrices

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I'm using a function that returns a matrix. I would like to see if the matrix is empty or not. How do I check this in R specifically for a matrix?

Any integer can be initialized by using z <- NULL . How can the same be done for a matrix?
Dec 17, 2018 in Data Analytics by Tyrion anex
• 8,280 points
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1 answer to this question.

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Try this, It will test if a matrix x has zero length:

length(x) == 0

You can initialize a matrix by doing this:

m <- matrix(, 0, 0)

Similarly, this initializes the matrix as 1x1 containing NA:

m <- matrix()

answered Dec 17, 2018 by Sophie may
• 9,530 points

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