"type" not working in R plot function with ecdf object

Question

My aim is to generate a cumulative distribution function made with steps, using the parameter type="s", but when i try for example

plot(ecdf(rgeom(0:40,0.3)), type="s")

it says the error

Error in plot.default(NA, NA, type = "n", xlim = xlim, ylim = ylim, xlab = xlab,  : formal argument "type" matched by multiple actual arguments

What to do?

Answer 1

Instead try:

plot(ecdf(rgeom(0:40,0.3)),verticals = TRUE)

In this case plot dispatches to plot.ecdf which in turn calls plot.stepfun. plot.stepfun initializes a plot using a call to plot() that specifies type = "n", hence the conflict in type arguments.

The verticals argument is from plot.ecdf and so it gets passed along happily without any conflicts.