Thanks to David and Jorge - both of your helpful suggestions got me to the desired endpoint. In case anyone else has this question: I boxplotted my y variable data, but did the "cut" operation on the x variable in order to conserve the order of the y data. I see another suggestion coming in from another user that basically says this.
So, my working line of code was: boxplot(count$RPKM ~ cut(count$C_count, breaks=4) Much appreciation to everyone who responded...thanks for helping with a naïve question without making me feel stupid. This discussion board is very, very good. --Kelly V. -----Original Message----- From: David Winsemius [mailto:dwinsem...@comcast.net] Sent: Friday, December 09, 2011 11:58 AM To: Uwe Ligges Cc: Vining, Kelly; r-help@r-project.org Subject: Re: [R] scatterplot to boxplot translation? On Dec 9, 2011, at 2:50 PM, Uwe Ligges wrote: > > > On 09.12.2011 20:41, Vining, Kelly wrote: >> Thanks for the tip on "cut," seems like it should work. I must still >> be missing something, though. Here, I'm cutting on the y variable, >> then attempting the boxplot: >> >> cutRPKM<- cut(count$RPKM, breaks=4) >> >> head(cutRPKM) >> [1] (-0.0995,24.8] (-0.0995,24.8] (-0.0995,24.8] (-0.0995,24.8] >> (-0.0995,24.8] [6] (-0.0995,24.8] >> Levels: (-0.0995,24.8] (24.8,49.8] (49.8,74.7] (74.7,99.6] >> >> boxplot(as.numeric(cutRPKM)) >> >> This gives me a single box instead of five boxes. ?? > > > You obviously want: > > boxplot(count$RPKM ~ cut(count$RPKM, breaks=seq(0, max(count$RPKM), > by=100))) In that context (having defined a cut-variable with single-integer break argument), would have thought this should work: boxplot(count$RPKM ~ cutRPKM) -- David. > > > Uwe Ligges > > >> Thanks again, >> --Kelly V. >> ________________________________________ >> From: David Winsemius [dwinsem...@comcast.net] >> Sent: Friday, December 09, 2011 11:14 AM >> To: Vining, Kelly >> Cc: r-help@r-project.org >> Subject: Re: [R] scatterplot to boxplot translation? >> >> On Dec 9, 2011, at 2:11 PM, Vining, Kelly wrote: >> >>> My apologies if anyone is seeing this twice...looks like my previous >>> message didn't come through... >>> >>> Dear UseRs, >>> I have a feeling this is a relatively simple question, but I'm >>> having a hard time getting my head around it. I have a simple x-y >>> scatterplot with many points, as shown below(attached). I'd like to >>> make a boxplot of this by interval, such that there is one box >>> representing the points in the 0-100 interval, one for the 101-200 >>> interval, and so on. How do I structure my R data frame to be able >>> to generate such a boxplot? >>> >> >> ?cut >> >>> >>> From: r-help-boun...@r-project.org >>> [mailto:r-help-boun...@r-project.org >>> ] On Behalf Of Vining, Kelly >>> Sent: Friday, December 09, 2011 11:01 AM >>> To: r-help@r-project.org >>> Subject: [R] scatterplot to boxplot translation? >>> >>> >>> <C_count_vs_RPKM.png>______________________________________________ >>> 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. >> >> David Winsemius, MD >> West Hartford, CT >> >> ______________________________________________ >> 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. David Winsemius, MD West Hartford, CT ______________________________________________ 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.
