Prints class(x), nrow(x) and ncol(x), but not the elements of x.
The motivation for having this method is that methods from the package
base such as
will try to print the values of all elements of
x, which can
take inconveniently much time and screen space if
x is large.
an object of S3-class
maximum number of rows to print.
further arguments that get ignored.
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