MALDIquantForeign, a easy question

chohnson

First of all, I apologize for using English because I am using a computer doesn't have Chinese...
Any body kindly answer my question please use Chinese.

Currently I am working on a set of data which is in the form of CDF files, I searched on line and found that MALDIquant is the right software that I can use and thus the horrible things began.

After I installed R, then MALDIquant, then, MALDIquantForeign, which were really tricky... And finally I got it.
But after I successfully installed all the packages, I found that I still do not know how to IMPORT my data.
As follow the example which I got from inside-R.org:

library("MALDIquant")
library("MALDIquantForeign")
## get example directory
exampleDirectory <- system.file(file.path("tests", "data"), package="MALDIquantForeign")
## import
s <- importCdf(exampleDirectory)

OK...
Following the example above, bellow is the feedback:

> library("MALDIquant")
> library(MALDIquantForeign)
> examleDirectory <- system.file(~Volumes/WINORMAC/ALL/AA("tests", "data"), package="MALDIquantForeign")
> s <- importCdf(exampleDirectory)
Error in import(path = path, type = "cdf", ...) :
  ‘’ doesn't exist or isn't readable!
>

So, can any body tell me, what is the problem here? Thank you very much!