This example is from "The R Book" by Michael J. Crawley. d=read.table( "http://www.bio.ic.ac.uk/research/mjcraw/therbook/data/diminish.txt"; ,header=TRUE) p=qplot(xv,yv,data=d); p m1=lm(yv~xv,data=d) p1=p + geom_abline(intercept=coefficients(m1)[1], slope=coefficients(m1)[2] ); p1 m2=lm(yv~xv + I(xv^2),data=d) x=seq(min(d$xv),max(d$xv),length=100) p1 + geom_line(aes(x=x,y=predict(m2,list(xv=x))), color="red")
I can run the above codes without any problems in an older version of R(R 2.10.1). But if I run the codes in a newer version of R(R 2.15, R 2.14), I got the error: > p1 + geom_line(aes(x=x,y=predict(m2,list(xv=x))), color="red") Error in data.frame(evaled, PANEL = data$PANEL) : arguments imply differing number of rows: 100, 18 I am confused about this error. Could someone help me? Thank you so much! Debbie ______________________________________________ R-help@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.
