Return a row vector with the size (number of elements) of each dimension for
the object a.
When given a second argument, dim, return the size of the corresponding
dimension.
With a single output argument, size returns a row vector. When called
with multiple output arguments, size returns the size of dimension N
in the Nth argument. The number of rows, dimension 1, is returned in the
first argument, the number of columns, dimension 2, is returned in the
second argument, etc. If there are more dimensions in a then there are
output arguments, size returns the total number of elements in the
remaining dimensions in the final output argument.
Example 1: single row vector output
size ([1, 2; 3, 4; 5, 6])
⇒ [ 3, 2 ]
Example 2: number of elements in 2nd dimension (columns)
size ([1, 2; 3, 4; 5, 6], 2)
⇒ 2
Example 3: number of output arguments == number of dimensions
[nr, nc] = size ([1, 2; 3, 4; 5, 6])
⇒ nr = 3
⇒ nc = 2
Example 4: number of output arguments != number of dimensions
[nr, remainder] = size (ones (2, 3, 4, 5))
⇒ nr = 2
⇒ remainder = 60
See also: numel, ndims, length, rows, columns, size_equal, common_size.