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 na?ve question without making me feel stupid. This discussion board is very, very good. --Kelly V. -----Original Message----- From: David Winsemius [mailto:dwinsemius at comcast.net] Sent: Friday, December 09, 2011 11:58 AM To: Uwe Ligges Cc: Vining, Kelly; r-help at 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 [dwinsemius at comcast.net] Sent: Friday, December 09, 2011 11:14 AM To: Vining, Kelly Cc: r-help at 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-bounces at r-project.org [mailto:r-help-bounces at r-project.org ] On Behalf Of Vining, Kelly Sent: Friday, December 09, 2011 11:01 AM To: r-help at r-project.org Subject: [R] scatterplot to boxplot translation? <C_count_vs_RPKM.png>______________________________________________ R-help at 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 at 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