x
.size(x, k)
x
, or the k
-th dimension
if k
is not missing.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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