@node Connect, Contour, Chdir, Commands

@iftex
@syntax Connect.
@end iftex
@example
Syntax: CONNECT WORD1 WORD2 [ IF (expr) ]
@end example
@pindex Connect

   CONNECT draws line segments connecting the points in vectors @code{WORD1} and
@code{WORD2}. If the IF clause is present, only connect those points for which 
@code{expr}
(see the section on vector arithmetic) is non-zero. Only contiguous
points in the input vectors will be connected, resulting in a number of
line-segments.

In fact, either or both of the @code{WORD}s may be replaced by
`parenthesised expressions', i.e. expressions in parentheses. For example,
@example
CONNECT x (2*y)
@end example
@noindent
plots x against 2y.

If @code{WORD1} and @code{WORD2} have different dimensions CONNECT will
ignore the excess points in the longer vector. If you want to plot a
constant value you'll have to explicitly promote it, for example
@example
CONNECT x (1+0*x)
@end example
@noindent
which makes a rather boring plot.

To draw a line in a label you can either use CONNECT or DRAW, or use the
@TeX{}-macro @code{\line} to directly insert your line.