[R] barplot as histogram

R. Michael Weylandt michael.weylandt at gmail.com
Fri Nov 4 19:18:04 CET 2011


plot(xs, ys, type = "h", lwd = 3)

will work?

I'm not sure that a direct call to hist(, plot = F) will get around
the data problems. If you type getAnywhere(hist.default) you can see
the code that runs hist(): perhaps you can extract the working bits
you need.


On Fri, Nov 4, 2011 at 2:04 PM, Jesse Brown <jesse.r.brown at lmco.com> wrote:
> Hello:
> I'm dealing with an issue currently that I'm not sure the best way to
> approach. I've got a very large (10G+) dataset that I'm trying to create a
> histogram for. I don't seem to be able to use hist directly as I can not
> create an R vector of size greater than 2.2G. I considered condensing the
> data  previous to loading it into R  and just plotting the frequencies as a
> barplot; unfortunately, barplot does not support plotting the values
> according to a set of x-axis positions.
> What I have is something similar to:
> ys <- c(12,3,7,22,10)
> xs <- c(1,30,35,39,60)
> and I'd like the bars (ys) to appear at the positions described by xs. I can
> get this to work on smaller sets by filling zero values in for missing ys
> for the entire range of xs but in my case this would again create a vector
> too large for R.
> Is there another way to use the two vectors to create a simulated frequency
> histogram? Is there a way to create a histogram object (as returned by hist)
> from the condensed data so that plot would handle it correctly?
> Thanks in advance,
> Jesse
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