How do I show the source code of an S4 function in a package?

Question

I used the packages topGO in R to analyze gene enrichment with the following code:

sampleGOdata <- new(\"topGOdata\", description = \"Simple session\",          


        

Answer 1

Use getMethod() and specify the signature. In your case, that could be eg :

getMethod("GenTable","topGOdata")

to show the GenTable method for topGOdata objects. In this case, there is only a method defined for topGOdata objects. In case there are methods with different signatures, showMethods() will tell you which ones. In your case :

showMethods("GenTable")
# Function: GenTable (package topGO)
# object="topGOdata"

You can get the code for the signature you want by specifying it in the getMethod() function.