Hi,

  Any ideas why I don't get the same graph out of p1 and p3?

 I have also posted it in the rstudio community without luck.
https://community.rstudio.com/t/ggplot2-geom-path-in-a-loop/102716/2

library(ggplot2)

df <- data.frame(x = c(0,25,0,-25,0), y = c(25,0,-25,0,25))
p1 <- ggplot()
p1 <- p1 + geom_path(data = df,aes(x = x/1, y = y/1))
p1 <- p1 + geom_path(data = df,aes(x = x/2, y = y/2))
p1 <- p1 + xlim(-30,30)
p1 <- p1 + ylim(-30,30)
p1

df <- data.frame(x = c(0,25,0,-25,0), y = c(25,0,-25,0,25))
p3 <- ggplot()
idx <- 1
p3 <- p3 + geom_path(data = df,aes(x = x/idx, y = y/idx))
idx <- 2
p3 <- p3 + geom_path(data = df,aes(x = x/idx, y = y/idx))
p3 <- p3 + xlim(-30,30)
p3 <- p3 + ylim(-30,30)
p3

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