hadoop - Revolution R: filter an xdf using another xdf -


i'm trying filter large xdf file (sitting on cloudera) using in compare xdf file (sitting on cloudera).

if try:

rxdatastep(indata = largexdf,        outfile = largexdf,        overwrite = true,        transformobjects =           list(param1 = parameter),        rowselection = (columnnamefromlargexdf %in% param1$1),        numrows = -1))

i error regarding param$1 saying objects of class s4 cannot subsetted. in xdf data objects cannot subsetted. there way around this? rather not convert xdf local csv file because large.

xdfs can subsetted, can't overwrite xdf on hdfs. need write different file. also, if saying parameter xdf way using in rowselection not correct.


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