ggplot “error in rename”

Question

update I have posted my solution below, the culprit was my own rename function that overrode reshape::rename

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I have been using the ggplot R package with little trouble until today. Today, I get an error using code that has previously worked, and when I debug it to the minimal working example, it still gives an error;

If I do this:

library(ggplot2)
d<- data.frame(x=1:3,y=1:3)
ggplot(data=d) + geom_line(aes(x,y))   

The following error is returned:

Error in rename(x, .base_to_ggplot) : 
  unused argument(s) (.base_to_ggplot)

The traceback is:

6: rename(x, .base_to_ggplot)
5: rename_aes(aes)
4: aes()
3: structure(list(data = data, layers = list(), scales = Scales$new(), 
       mapping = mapping, options = list(), coordinates = CoordCartesian$new(), 
       facet = FacetGrid$new(), plot_env = environment), class = "ggplot")
2: ggplot.data.frame(data = d, aes = c(x, y))
1: ggplot(data = d, aes = c(x, y))

The error does not occur after removing all objects using rm(list=ls()) , but it is still not clear to me what object is causing this error or why - how can I figure this out?

Does anyone know what may have gone wrong?

Answer 1

I'm not able to return the same error message that you've posted above. When running your code snippet, I'm getting the following error:

Error: geom_pointrange requires the following missing aesthetics: ymin, ymax

Accordingly, geom_pointrange() is expecting arguments for ymin and ymax . I'll leave it up to you to fill in your pertinent information for what should go into those parameters, but this code executes:

ggplot(data=d) + geom_pointrange(aes(x,y, ymin = y - .5, ymax = y + .5))

Answer 2

The error was caused by one of the objects (thanks to pointers from @Chase).

Here is how I debugged and found the culprit. The important part was to use the try() function that keeps the for loop running despite errors

foo <- ls() #get a static list of all suspect objects
for(i in 1:length(foo)) {
    print(foo[i])
    rm(list=foo[i])
    try(ggplot()+geom_point(aes(x=1:2,y=1:2)))
}

This resulted in the following output:

...
[1] "45 reg.model"
Error in rename(x, .base_to_ggplot) : 
  unused argument(s) (.base_to_ggplot)
[1] "46 reg.parms"
Error in rename(x, .base_to_ggplot) : 
  unused argument(s) (.base_to_ggplot)
[1] "47 rename"
[1] "48 samples"
...

aha! it was my own function rename that caused the error, since ggplot2 relies on reshape::rename .

Solution: rename the new rename function... how to prevent this in the future? Perhaps study up on the use of namespaces.

Answer 3

问题是由于ggplot2不使用命名空间引起的 - 这将在下一个版本中修复。