[R] barplot as histogram

R. Michael Weylandt
Fri, 04 Nov 2011 18:18:04 -0000

Perhaps

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.

Michael

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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