Hi:
Try
mydf <- data.frame(let=rep(letters[1:3],each=3), num=rnorm(9),
stringsAsFactors=FALSE)
stripchart(num ~ let, data = mydf, pch = 19, vertical = TRUE)
Dennis
On Thu, Mar 17, 2016 at 3:29 AM, Ivan Calandra
<ivan.calandra at univ-reims.fr> wrote:
Dear useRs,
I would like to plot data points in a simple scatterplot. I don't have a lot
of data per category, so a boxplot does not make sense.
Here are some sample data:
mydf <- data.frame(let=rep(letters[1:3],each=3), num=rnorm(9),
stringsAsFactors=FALSE)
I would like to do that, which throws an error, most likely because x is
character:
plot(mydf$let, mydf$num)
If I convert to factor(), it plots a boxplot with no possibility (AFAIK) to
plot points:
mydf$let <- factor(mydf$let)
plot(mydf$let, mydf$num, type='p')
I know I can use the function points() in a somewhat convoluted manner:
plot(mydf$num, xlim=c(1,3), type='n', xaxt='n')
axis(side=1, at=1:3, labels=levels(mydf$let))
points(as.numeric(mydf$let), mydf$num)
Isn't there a simple(r) way? Maybe I just missed something obvious...
Thank you in advance for your help,
Ivan
--
Ivan Calandra, PhD
University of Reims Champagne-Ardenne
GEGENAA - EA 3795
CREA - 2 esplanade Roland Garros
51100 Reims, France
+33(0)3 26 77 36 89
ivan.calandra at univ-reims.fr
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