llines: Replacements of traditional graphics functions

Description

These functions are intended to replace common low level traditional graphics functions, primarily for use in panel functions. The originals can not be used (at least not easily) because lattice panel functions need to use grid graphics. Low level drawing functions in grid can be used directly as well, and is often more flexible. These functions are provided for convenience and portability.

Usage

lplot.xy(xy, type, pch, lty, col, cex, lwd,
         font, fontfamily, fontface,
         col.line, col.symbol, alpha, fill,
         origin = 0, ...)
llines(x, ...)
lpoints(x, ...)
ltext(x, ...)
## S3 method for class 'default':
llines(x, y = NULL, type = "l",
       col, alpha, lty, lwd, \dots)
## S3 method for class 'default':
lpoints(x, y = NULL, type = "p", col, pch, alpha, fill,
        font, fontfamily, fontface, cex, \dots)  
## S3 method for class 'default':
ltext(x, y = NULL, labels = seq_along(x),
      col, alpha, cex, srt = 0,
      lineheight, font, fontfamily, fontface,
      adj = c(0.5, 0.5), pos = NULL, offset = 0.5, ...)  
lsegments(x0, y0, x1, y1, x2, y2,
          col, alpha, lty, lwd, ...)
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,
      ...)
larrows(x0 = NULL, y0 = NULL, x1, y1, x2 = NULL, y2 = NULL,
        angle = 30, code = 2, length = 0.25, unit = "inches",
        ends = switch(code, "first", "last", "both"),
        type = "open",
        col = add.line$col,
        alpha = add.line$alpha,
        lty = add.line$lty,
        lwd = add.line$lwd,
        fill = NULL, ...)
lpolygon(x, y = NULL,
         border = "black", col = "transparent",
         font, fontface, ...)
panel.lines(...)
panel.points(...)
panel.segments(...)
panel.text(...)
panel.rect(...)
panel.arrows(...)
panel.polygon(...)

Arguments

x, y, x0, y0, x1, y1, x2, y2, xy

locations. x2 and y2 are available for for S compatibility.

length, unit

determines extent of arrow head. length specifies the length in terms of unit, which can be any valid grid unit as long as it doesn't need a data argument. unit defaults to inches, which is

angle, code, type, labels, srt, adj, pos, offset

arguments controlling behaviour. See respective base functions for details. For larrows and panel.larrows, type is either "open" or "closed", indicating the type of arrowhea

ends

serves the same function as code, using descriptive names rather than integer codes. If specified, this overrides code

col, alpha, lty, lwd, fill, pch, cex, lineheight, font, fontfamily, fontface, col.line, col.symbol, border

graphical parameters. fill applies to points when pch is in 21:25 and specifies the fill color, similar to the bg argument in the base graphics function

origin

for type="h" or type="H", the value to which lines drop down.

xleft, ybottom, xright, ytop

see rect

width, height, just, hjust, vjust

finer control over rectangles, see grid.rect

...

extra arguments, passed on to lower level functions as appropriate.

Details

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 panel.* are essentally identical to the 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.

Description

Usage

Arguments

Details

See Also