dplyrXdf临时文件问题

Question

It appears that there is some issue creating the temporary file that backs dplyrXdf , any thoughts?

xdf='/mnt/saswork/testout.xdf'
xdf %>% group_by(factor_pair)

Error in UseMethod("group_by_") :
no applicable method for 'group_by_' applied to an object of class "character"
xdf %>% dplyrXdf::tblSource() %>% group_by(factor_pair) grouped_tbl_xdf Source "/tmp/Rtmp0oFfIY/file5c6964534b5c.xdf" fileSystem: fileSystemType: native xdf %>% dplyrXdf::tblSource() %>% group_by(factor_pair) %>% summarise(blah=sum(pair_dist))
Error in rxLocateFileInternal(file, pathsToSearch, fileSystem, isOutFile = isOutFile, : /tmp/Rtmp0oFfIY/file5c6955f5cf2a.xdf not found in paths .;

Working dir is: /home/aak87 .

 list.files(tempdir())


[1] "file5c6934f5920f"                                                                           
[2] "libloc_188_f198c64896a74076.rds"                                                            
[3] "libloc_203_fe207b7ffd125d09.rds"                                                            
[4] "repos_http%3A%2F%2Fmran.revolutionanalytics.com%2Fsnapshot%2F2015-11-30%2Fsrc%2Fcontrib.rds"
[5] "tmp_dropbox"   

Answer 1

Could you try first making an RxXdfData object?

xdf <- RxXdfData('/mnt/saswork/testout.xdf')
xdf %>% group_by(factor_pair) %>% tally()

dplyrXdf will work best when called against RxXdfData objects since it'll find the right methods to use with that class.