I have installed the R (R version 3.3.1) package of clusterProfile and run it step by step on the basis of Mr Yu's work "Using clusterProfiler to identify and compare functional profiles of gene lists ".It's strange that it occured an error described below:

> library(clusterProfiler)

Loading required package: DOSE

> require(DOSE)

> data(geneList)

> gene <- names(geneList)[abs(geneList) > 2]

> ggo <- groupGO(gene = gene, organism = "human", ont = "BP",level = 3, readable = TRUE)

Error in groupGO(gene = gene, organism = "human", ont = "BP", level = 3,  : 

unused argument (organism = "human")

   I don't understand why there should be an error like that and ask all of you for suggestions. Thanks.

Your document might be obsolete. you can install the latest clusterProfiler package, and look at the help info for function groupGO where the 2nd parameter should be  OrgDb (the meta package name)

groupGO(gene, OrgDb, keytype = "ENTREZID", ont = "CC", level = 2,
  readable = FALSE)