[R] ggplot2 error: arguments imply differing number of rows

[ux.seo]

As  you got the error message, to use ggplot function, you had better make a
data.frame with your data "d".
for example, d[ n x p], n : observations, p : variables
n = dim(d)
dd = data.frame(x=d[,2:n[2]], y=d[,1])
then, you may get the better result after apply "dd" to the ggplot function.

> 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 
This example is from "The R Book" by Michael J. Crawley.



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