R help - Jan 2008 - binning data

I would like to 'bin' a vector of of values (>100000 values) in much
the same way as 'hist' does for plotting, but I just want a result
with the bins and the frequencies.

Is there a 'quick and dirty' (built-in) way to do this, or do I need
to write some code?

Many thanks,

Robert Terwilliger

Robert Terwilliger wrote:
> I would like to 'bin' a vector of of values (>100000 values) in
much
> the same way as 'hist' does for plotting, but I just want a result
> with the bins and the frequencies.
>
> Is there a 'quick and dirty' (built-in) way to do this, or do I
need
> to write some code?
>
> Many thanks,
>
> Robert Terwilliger
If you want the SAME bins as used by hist(), you can use:

   hist(Vec, breaks = ..., plot = FALSE)$counts

Another alternative is to use cut() to bin a vector and return a factor, 
upon which you can then use table() to get the counts. For example:

   table(cut(Vec, breaks = ...))

See ?hist and ?cut for more information.

HTH,

Marc Schwartz

On 15/01/2008, at 5:13 AM, Robert Terwilliger wrote:
> I would like to 'bin' a vector of of values (>100000 values) in
much
> the same way as 'hist' does for plotting, but I just want a result
> with the bins and the frequencies.
>
> Is there a 'quick and dirty' (built-in) way to do this, or do I
need
> to write some code?
?hist

(Hint:  Look at ``Value''.  Also look at the ``plot'' argument.)

	cheers,

		Rolf Turner

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