Currently I am doing some cumulative distribution plot using R and I tried to set x-axis with **decreasing power values** (such as 10000,1000,100,10,1) in equal sizes but I failed:

```
n<-ceiling(max(test))
qplot(1:n, ecdf(test)(1:n), geom="point",xlab="check-ins",
ylab="Pr(X>=x)")+ geom_step()
+scale_x_reverse(breaks=c(10000,1000,100,10,1))
+scale_shape_manual(values=c(15,19))
```

It seems that the output has large interval for 10000, then all the other 4 values are left in the small right size of x-axis together. Does anyone knows how to set x-axis value with different intervals in **equal sizes**? Many Thx.

Answer:

Combining the example by @Robert and code from the answer featured here: How to get a reversed, log10 scale in ggplot2?

```
library("scales")
library(ggplot2)
reverselog_trans <- function(base = exp(1)) {
trans <- function(x) -log(x, base)
inv <- function(x) base^(-x)
trans_new(paste0("reverselog-", format(base)), trans, inv,
log_breaks(base = base),
domain = c(1e-100, Inf))
}
set.seed(12345)
test=rnorm(20,1000,5000)
n<-ceiling(max(test))
qplot(1:n, ecdf(test)(1:n), geom="point",xlab="check-ins",
ylab="Pr(X>=x)")+ geom_step()+
scale_x_continuous(trans=reverselog_trans(10), breaks = c(10000,1000,100,10,1))
```

This should do what you want, i.e. the distance on the x-axis from 10000 to 1000 is the same as the one from 10 to 1.

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