[R] Help with the Cut Function

[David Winsemius]

> On Jun 25, 2016, at 12:05 PM, Shivi Bhatia <shivipmp82 at gmail.com> wrote:
> 
> Dear Team,
> 
> Please see the code below:
> 
> Age1<- cut(desc$Age, breaks = c(20,30,40,Inf),labels = c("Low","Mid","Top"))

Try instead:

Age1<- cut(desc$Age, breaks = c(-Inf, 20,30,40,Inf),labels = c("Low","Mid","Top"))

Do note that values that are <= 20 will be in the lowest category. (You wrote only <20 whereas values of 20 would have not been in any interval.)  The cut function also has a use.lowest argument, whose actions I don't fully understand but I usually set to to TRUE whereas is default is FALSE. I prefer the Hmisc::cut2 functions because its defaults mirror my usual interests. Like cut2, the findInterval function has closed intervals on the left.

> here i am creating three categories as mentioned from the age var from desc
> data set.
> All the values are set correctly however the values which are below 20 are
> set to NA.
> Is there anything i am doing incorrect.
> 
> Regards, Shivi
> 
> 	[[alternative HTML version deleted]]
> 
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David Winsemius
Alameda, CA, USA