The way you've attempted to get this result seems to align with the way
R "should" work, but it fails in this case.
The fix is to break things up a little bit:
p <- ggplot(mydata, aes(x=Est, y=Tri))
p <- p + geom_point(aes(colour=factor(Group),shape=factor(Group)))
p <- p +
geom_smooth(aes(group=factor(Group),color=factor(Group)),method=lm,se=F)
p
Eric
Juliet Hannah wrote:
Here is some sample data:
mydata <- read.table(textConnection("Est Group Tri
0 0 4.639644
1 0 4.579189
2 0 4.590714
0 1 4.443696
1 1 4.588243
2 1 4.650505
0 2 4.296608
1 2 4.826036
2 2 4.765386"),header=TRUE);
closeAllConnections();
I can form two plots, scatter and lines, as follows:
p <- ggplot(mydata, aes(x=Est, y=Tri))
p + geom_point(aes(colour=factor(Group),shape=factor(Group)))
and
p+ geom_smooth(aes(group=factor(Group),color=factor(Group)),method=lm,se=F).
However, I am unable to have the plots together.
I obtain the following error:
p +
geom_point(aes(colour=factor(Group),shape=factor(Group)))+geom_smooth(aes(group=factor(Group),color=factor(Group)),method=lm,se=F)
Error in `[.data.frame`(df, , var) : undefined columns selected
Thanks,
Juliet
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and provide commented, minimal, self-contained, reproducible code.
