[R] Histogram Bin

[David Winsemius]

On May 14, 2010, at 9:55 AM, Research wrote:

> Hello,
>
> Is there a function that returns the number of the "bin" (or  
> quantile, or percentile etc. etc.) that a value of a variable may  
> belong to?
>
> Tor example:
>
> breaks<-hist(variable, 18, plot=FALSE)
>
> If the following breaks are
>
> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85

 > findInterval(6, c(-Inf, brks) )
[1] 2

>
> the boundaries of successive bins of a histogram, then value "6"  
> belongs to the 2nd bin.

The first actually, but if you were considering the left hand boundary  
as -Inf, then you need to add it to the vector to get the correct  
answer from findInterval.

>
> Best regards,
> Costas
>
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David Winsemius, MD
West Hartford, CT