[R] Help with assigning a value based on existing numbers

[Petr PIKAL]

Hi


"Jessica Cathro" <jcathro at london.edu> napsal dne 26.03.2010 15:33:19:

> Hi
> Can you explain what the purpose of the cut function is, and how I would
> use it?

?cut

x<-runif(100)*300
cut(x, breaks=seq(0,300,50), labels=letters[1:6])

Regards
Petr


> Thanks
> Jessica
> 
> _________________________________
> 
> Jessica Cathro | Business Analyst | Executive Education 
> London Business School | Regent's Park | London NW1 4SA | United Kingdom
> Switchboard +44 (0)20 7000 7000| Direct line +44 (0)20 7000 7383 |
> Email jcathro at london.edu
> 
> www.london.edu | London experience. World impact.
> -----Original Message-----
> From: Petr PIKAL [mailto:petr.pikal at precheza.cz] 
> Sent: 26 March 2010 14:00
> To: Jessica Cathro
> Cc: r-help at r-project.org
> Subject: Odp: [R] Help with assigning a value based on existing numbers
> 
> Hi
> 
> again a work for cut.
> 
> See ?cut and notice a labels option.
> 
> Regards
> Petr
> 
> r-help-bounces at r-project.org napsal dne 26.03.2010 11:37:20:
> 
> > Hi All
> > 
> > I have a column/variable called time difference.  It has a whole list
> of
> > numbers from 0 through to the hundreds eg 236.  I want to assign a
> > corresponding "name" to each variable from a predefined list: Month or
> > less, 1 -2 months, 2-3 months etc
> > 
> > So the result would look something like:
> > 
> > Time Difference               Month
> > 
> > 1                                              Month or less
> > 
> > 365                                         1-2 years
> > 
> > 52                                           2-3 months
> > 
> > Etc
> > 
> > 
> > 
> > I have tried using if elseif (as shown below), but it kept coming up
> > with the error:
> > 
> > Error:
> > 
> > In if (curvedata$Date.difference == "NULL") { :
> > 
> >   the condition has length > 1 and only the first element will be used
> > 
> > 2: In if (curvedata$Date.difference <= 29) { :
> > 
> >   the condition has length > 1 and only the first element will be used
> > 
> > 3: In if (curvedata$Date.difference <= 59) { :
> > 
> >   the condition has length > 1 and only the first element will be used
> > 
> > 
> > 
> > If Else Statement:
> > 
> > month <-if (curvedata$Date.difference =="NULL") {Month <-0}  ifelse
> > 
> > (curvedata$Date.difference <=29) {Month <-"month or less"} else if
> > 
> > (curvedata$Date.difference <=59) {Month <-"1-2 months"} else if
> > 
> > (curvedata$Date.difference <=89) {Month <-"2-3 months"} else if
> > 
> > (curvedata$Date.difference <=119) {Month <-"3-4 months"} else if
> > 
> > (curvedata$Date.difference <=149) {Month <-"4-5 months"} else if
> > 
> > (curvedata$Date.difference <=179) {Month <-"5-6 months"} else if
> > 
> > (curvedata$Date.difference <=209) {Month <-"6-7 months"} else if
> > 
> > (curvedata$Date.difference <=239) {Month <-"7-8 months"} else if
> > 
> > (curvedata$Date.difference <=269) {Month <-"8-9 months"} else if
> > 
> > (curvedata$Date.difference <=299) {Month <-"9-10 months"} else if
> > 
> > (curvedata$Date.difference <=329) {Month <-"10-11 months"} else if
> > 
> > (curvedata$Date.difference <=359) {Month <-"11-12 months"} else if
> > 
> > (curvedata$Date.difference <=719) {Month <-"1-2 years"} else 
> > 
> > {Month <-"More than 2 years"}
> > 
> > 
> > 
> > I'm pretty new to R, so any help would be appreciated.
> > 
> > Thanks
> > 
> > Jessica
> > 
> > _________________________________
> > 
> > Jessica Cathro | Business Analyst | Executive Education 
> > London Business School | Regent's Park | London NW1 4SA | United
> Kingdom
> > Switchboard +44 (0)20 7000 7000| Direct line +44 (0)20 7000 7383 |
> > Email jcathro at london.edu <mailto:jcathro at london.edu> 
> > 
> > www.london.edu <http://www.london.edu/>  | London experience. World
> > impact.
> > 
> > 
> > ______________________________________________________________________
> > 
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> 
> 
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