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Dot plot of character and numeric matrix
3 messages · Ng Wee Kiat Jeremy, Jessica Streicher, Jeff Newmiller
As an example:
chars<-c("A","A","B")
numbers<-as.numeric(as.factor(chars)) #make this numerical
plot(numbers,c(0.4,0.5,0.6),xaxt="n") #xaxt="n" says to not plot the x-axis
axis(side=1,at=numbers,labels=chars) #make the axis with labels
On 23.01.2013, at 10:16, Ng Wee Kiat Jeremy wrote:
Dear List, I have a set of data which looks like this (small set of sample) A A 0.431 A A 0.439 A A 0.507 A G 0.508 A A 0.514 I will like to use this data to plot a dot plot, with the X-axis being of type character, and my y axis of type numeric. When I try to use the dot chart function, I get the error message "'x' must be a numeric vector or matrix", which I can understand it to be a result of the fact that I have characters AA, AG etc as my x-values. Any idea how I can go about doing this? Thanks in advanced! Jeremy [[alternative HTML version deleted]]
______________________________________________ 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.
I think you need to become more familiar with the "factor" data type. Reread the Introduction to R document that comes with R.
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Ng Wee Kiat Jeremy <jeremy.ng.wk1990 at gmail.com> wrote:
Dear List, I have a set of data which looks like this (small set of sample) A A 0.431 A A 0.439 A A 0.507 A G 0.508 A A 0.514 I will like to use this data to plot a dot plot, with the X-axis being of type character, and my y axis of type numeric. When I try to use the dot chart function, I get the error message "'x' must be a numeric vector or matrix", which I can understand it to be a result of the fact that I have characters AA, AG etc as my x-values. Any idea how I can go about doing this? Thanks in advanced! Jeremy [[alternative HTML version deleted]]
______________________________________________ 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.