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vconcat(a,b,c,... [,labels:structure(rowLabs,colLabs), silent:T]) where
  a, b, c, ... matrices and rowLabs and colLabs are CHARACTER scalars or

Keywords: combining variables, variables, null variables
vconcat(a,b,c,...) combines matrices a, b, c ... vertically by
concatenating their columns.

All arguments must be of the same type, REAL, LOGICAL, or CHARACTER, and
have the same number of columns n.  The result is a matrix of that type
with n columns and ma+mb+mc+... rows, where ma, mb, mc, ... are the
number of rows of a, b, c, ... .

vconcat(a,b,...,labels:structure(rowLabs,colLabs) [,silent:T]) uses
CHARACTER scalars or vectors rowLabs and colLabs as row and column
labels for the result.  With silent:T, no warning is printed if labels
are the wrong size.  See topic 'labels' for details.

Any argument that is a vector of length m is considered to be a m by 1
matrix.  In particular, if a is a vector of length m, vconcat(a) is a m
by 1 matrix.

An argument that is an array with only two dimensions not equal to 1 is
considered to be a matrix (see 'matrices').  For example,
is equivalent to

Any argument of type NULL is ignored.  When all arguments are NULL, so
is the result.

See also topics hconcat(), 'matrices', 'vectors'.

Gary Oehlert 2003-01-15