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Usage:
ncols(x) where x is a matrix or generalized matrix
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Keywords:
variables
ncols(x) returns the number of columns of matrix argument x. If x has
more than two dimensions, no more than two dimensions may exceed 1 and
it is treated as described in topic 'matrices'.
If x is a structure, ncols(x) is a structure. If xi is the i-th
component of x, the i-th component of ncols(x) is ncols(xi).
Examples:
Cmd> x <- run(7); vector(nrows(x),ncols(x),nrows(x'),ncols(x'))
(1) 7 1 1 7
Cmd> y <- array(run(24),1,6,1,4);vector(nrows(y),ncols(y))
(1) 6 4
Cmd> ncols(structure(x,y))
component: x
(1) 1
component: y
(1) 4
See also topics nrows(), dim(), ndims(), length(), 'structures'.
Gary Oehlert
2003-01-15