Hm Not much of an example.
You can cut your m according to breaks cc <- cut(m, c(0,331,476, 608, 791, 900)) [1] (0,331] (331,476] (476,608] (608,791] (791,900] <NA> Levels: (0,331] (331,476] (476,608] (608,791] (791,900] You can add NA as an extra level by factor(cc, exclude=NULL) [1] (0,331] (331,476] (476,608] (608,791] (791,900] <NA> Levels: (0,331] (331,476] (476,608] (608,791] (791,900] <NA> but I wonder what you want to do with m_group then. You shall explain in more detail what you want to do to get sensible answer. Regards Petr > > Thanks for your reply. > > Let me make an example then: > > m<- c(150, 400, 500,750,800, NA) > > How can I use cut to generate the m_group as c(0,0.4755,1, 0.2275,0,0): > > Breaks 331.04 476.07 608.66 791.5 NA > m_group 0 x 1 x 0 0 > > Thank you very much! > > Regards, > Yan > > -----Original Message----- > From: Uwe Ligges [mailto:lig...@statistik.tu-dortmund.de] > Sent: Tuesday, October 18, 2011 5:23 AM > To: Li, Yan > Cc: r-help@r-project.org > Subject: Re: [R] cut data into sevral group and assign calculated values > individually > > > > On 17.10.2011 20:53, Li, Yan wrote: > > Hi All, > > > > I have some data from which I set four points to be breaks. Based on > these points, I cut the dataset into four groups and assign a number to it: > > > > <=331.04 assign 0 > >> 331.04<=476.07 assign data-331.04/(476.07-331.04) > >> 476.07<=608.66 assign 1 > >> 608.66<=791.5 assign 791.5- data/(791.5-608.66) > >> 791.5 and NA assign 0 > > > > > > Breaks 331.04 476.07 608.66 791.5 NA > > m_group 0 x 1 x > 0 0 > > > > > > I can use cut() to group the data according to the breaks but having > difficulty to assign the two calculated interval values. > > > > > Based on the levels of the factor resulted by cut(), you can calculate a > new vector easily. But since you have not specified a reproducible > example, I cannot quickly change it in order to show how it works. > > Best, > Uwe Ligges > > > > > Thank you very much! > > > > Regards, > > Yan > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.