One-Dimensional Scatter Plot
USAGE: 
stripplot(formula, jitter = FALSE, ...)

The following arguments have special meaning within this function. The common meanings for these and all other arguments are listed separately under trellis.args.

formula:
a formula in the form y ~ x | g1 * g2 * ... however the given variables g1, g2, ... may be omitted. y in formula will be coerced into a factor or shingle. x must be numeric.
jitter:
logical flag, should the data be jittered in a vertical direction in order to avoid overplotting.
VALUE:
an object of class trellis, which is automatically plotted by print.trellis.
SEE ALSO:
panel.stripplot , trellis.args .
EXAMPLES: 
stripplot(voice.part ~ jitter(height), data = singer, aspect = 1,
          jitter = T, xlab = "Height (inches)")