[R] Dot plot of character and numeric matrix
Jessica Streicher
j.streicher at micromata.de
Wed Jan 23 13:28:07 CET 2013
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]]
>
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