[R] plotting ecdf; R is stalled

[Jonathan]

Dear R-help:
      I am trying to plot the cumulative distribution function of a
vector of around 33 million numeric observations.

> plot.ecdf(myDataVector)

R has been non-responsive for about an hour, and my guess is that it's
probably not going to finish.

Does anybody have a sense whether this a reasonable experience (and if
so, is there a way to get the desired effect, or am I SOL)?  I can't
find anything in the help archives.

OS: Windows 7 64-bit; R version 2.10.1; RAM: 4 gb

Thanks,
Jonathan