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Usage:
length(x), x a vector, matrix, or array or any other type of variable.
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Keywords:
variables, null variables
length(x) computes the total number of elements in the vector, matrix,
or array x. The value of length(x) is prod(dim(x)).
If x is a NULL variable, length(x) = 0.
If x is a GRAPH variable or a macro, length(x) = 1.
If x is a structure, length(x) is a structure. If xi is component i of
x, the component i of length(x) has the same component name and value
length(xi).
See also topics dim(), ndims(), ncomps(), 'NULL', 'graphs'.
Gary Oehlert
2003-01-15