\HeaderA{llines}{Lattice Replacements of base graphics functions}{llines}
\aliasA{larrows}{llines}{larrows}
\aliasA{lplot.xy}{llines}{lplot.xy}
\aliasA{lpoints}{llines}{lpoints}
\aliasA{lrect}{llines}{lrect}
\aliasA{lsegments}{llines}{lsegments}
\aliasA{ltext}{llines}{ltext}
\aliasA{panel.arrows}{llines}{panel.arrows}
\aliasA{panel.lines}{llines}{panel.lines}
\aliasA{panel.points}{llines}{panel.points}
\aliasA{panel.rect}{llines}{panel.rect}
\aliasA{panel.segments}{llines}{panel.segments}
\aliasA{panel.text}{llines}{panel.text}
\keyword{dplot}{llines}
\begin{Description}\relax
These functions are intended to replace some commonly used base R
graphics functions in panel functions.
\end{Description}
\begin{Usage}
\begin{verbatim}
larrows(x0 = NULL, y0 = NULL, x1, y1, x2 = NULL, y2 = NULL,
        angle = 30, code = 2, length = 0.25, unit = "inches",
        col, alpha, lty, lwd, fill = NULL, ...)
llines(x, y = NULL, type = "l", col, alpha, lty, lwd, ...)
lplot.xy(xy, type, pch, lty, col, cex, lwd,
         font, fontfamily, fontface, col.line, alpha, fill, ...)
lpoints(x, y = NULL, type = "p", col, pch, alpha, fill,
        font, fontfamily, fontface, cex, ...)  
lsegments(x0, y0, x1, y1, x2, y2,
          col, alpha, lty, lwd, ...)
ltext(x, y = NULL, labels = seq(along = x),
      col, alpha, cex, srt = 0,
      font, fontfamily, fontface,
      adj = c(0.5, 0.5), pos = NULL, offset = 0.5, ...)  
lrect(xleft, ybottom, xright, ytop,
      x = (xleft + xright) / 2,
      y = (ybottom + ytop) / 2,
      width = xright - xleft,
      height = ytop - ybottom,
      col = "transparent",
      border = "black",
      lty = 1, lwd = 1, alpha = 1,
      just = "center",
      hjust = NULL, vjust = NULL,
      ...)
panel.arrows(...)
panel.lines(...)
panel.points(...)
panel.segments(...)
panel.text(...)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{ x, y, x0, y0, x1, y1, x2, y2, xy}] locations. \code{x2} and
\code{y2} are available for for S compatibility.  
\item[\code{length, unit}] determines extent of arrow head.  \code{length} specifies the length
in terms of \code{unit}, which can be any valid grid unit as long as
it doesn't need a \code{data} argument.  \code{unit} defaults to
inches, which is the only option in the base version of the
function, \code{\LinkA{arrows}{arrows}}.  
\item[\code{angle, code, type, labels, srt, adj, pos, offset}] arguments
controlling behaviour.  See respective base functions for details. 
\item[\code{col, alpha, lty, lwd, fill, pch, cex, font, fontfamily,
fontface, col.line, border}] graphical parameters.  \code{fill}
applies to points when \code{pch} is in \code{21:25} and specifies
the fill color, similar to the \code{bg} argument in the base
graphics function \code{\LinkA{points}{points}}. For devices that support
alpha-transparency, a numeric argument \code{alpha} between 0 and 1
can controls transparency.  Be careful with this, since for devices
that do not support alpha-transparency, nothing will be drawn at all
if this is set to anything other than 0.  
\item[\code{xleft, ybottom, xright, ytop}] see \code{\LinkA{rect}{rect}}
\item[\code{width, height, just, hjust, vjust}] finer control over
rectangles, see \code{\LinkA{grid.rect}{grid.rect}} 
\item[\code{...}] extra arguments, passed on to lower level functions as
appropriate.  
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
These functions are meant to be grid replacements of the corresponding
base R graphics functions, to allow existing Trellis code to be used
with minimal modification.  The functions \code{panel.*} are
essentally identical to the \code{l*} versions, are recommended for
use in new code (as opposed to ported code) as they have more readable
names.

See the documentation of the base functions for usage. Not all
arguments are always supported. All these correspond to the default
methods only. For \code{ltext}, only values 0, .5 and 1 for \code{adj}
have any effect.
\end{Details}
\begin{Note}\relax
There is a new \code{type="H"} option wherever appropriate, which is
similar to \code{type="h"}, but with horizontal lines.
\end{Note}
\begin{Author}\relax
Deepayan Sarkar \email{Deepayan.Sarkar@R-project.org}
\end{Author}
\begin{SeeAlso}\relax
\code{\LinkA{points}{points}}, \code{\LinkA{lines}{lines}}, \code{\LinkA{rect}{rect}},
\code{\LinkA{text}{text}}, \code{\LinkA{segments}{segments}}, \code{\LinkA{arrows}{arrows}},
\code{\LinkA{Lattice}{Lattice}}
\end{SeeAlso}

