Hello, I apologize in advance if this has been covered before, but I'm trying to write a generic function that takes 3 URL parameters of the form:
http://my.url?param1='f1=a,f2=b'¶m2='c,d'¶m3='e,f' and simply pass them to dt(), so the expression to evaluate is: dt[f1=="a" & f2=="b", list( t1(c), t2(d) ), by=list( e, f )] where t1, t2 are custom aggregation functions. I can't seem to find an elegant way to convert the strings to vector names. Using .SDcols does work for the elements in j, but what about i and by? Any tip would be very helpful! Thanks, --Mel. _______________________ Melanie Bacou IFPRI / HarvestChoice Washington DC, 20006 W +1(202)862-5699 C +1(202)492-7978 [email protected] _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
