stripchart               package:base               R Documentation

1-D Scatter Plots

Description:

     `stripchart' produces one dimensional scatter plots (or dot plots)
     of the given data.  These plots are are good alternative to 
     `boxplot's when sample sizes are small.

Usage:

     stripchart(x, method="overplot", jitter=0.1, offset=1/3,
                vertical=FALSE, group.names,
                xlim=NULL, ylim=NULL, main="", ylab="", xlab="",
                pch=0, col=par("fg"), cex=par("cex"))

Arguments:

       x: the data from which the plots are to be produced.  The data
          can be specified as a single vector, or as list of vectors,
          each corresponding to a component plot.  Alternatively a
          symbolic specification of the form `x ~ g' can be given,
          indicating the the observations in the vector `x' are to be
          grouped according to the levels of the factor `g'. `NA's are
          allowed in the data.

  method: the method to be used to separate coincident points. The
          default method `"overplot"' causes such points to be
          overplotted, but it is also possible to specify `"jitter"' to
          jitter the points, or `"stack"' have coincident points
          stacked.  The last method only makes sense for very granular
          data.

  jitter: when jittering is used, `jitter' gives the amount of
          jittering applied.

  offset: when stacking is used, points are stacked this many
          line-heights (symbol widths) apart.

vertical: when vertical is `TRUE' the plots are drawn vertically rather
          than the default horizontal.

group.names: group labels which will be printed alongside (or
          underneath) each plot.

xlim, ylim, main, ylab, xlab, pch, col, cex: Graphical parameters.

Details:

     Extensive examples of the use of this kind of plot can be found in
     Box, Hunter and Hunter or Seber and Wild.

Examples:

     x <- round(rnorm(50), 1)
     stripchart(x)

