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x

size(x, k)

k

length(x)

Vector will be treated as a single row matrix.

dim

size(1:8) size(matrix(1:8, 2, 4)) # 2 4 size(matrix(1:8, 2, 4), 2) # 4 size(matrix(1:8, 2, 4), 3) # 1

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