I have some problems understanding how to use geom_path() inside a loop.

I know the code below is a bit silly but it is just a MRE

( How to create a Minimal, Reproducible Example - Help Center - Stack Overflow )

p1 looks like I expect however p2 only contains the last square. I

expected p2 to be the same as p1.

Any hints what is going on?

Regards

Martin

```
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
p2 <- ggplot()
for (idx in 1:2) {
p2 <- p2 + geom_path(data = df,aes(x = x/idx, y = y/idx))
}
p2 <- p2 + xlim(-30,30)
p2 <- p2 + ylim(-30,30)
p2
```