search for: f2z

Displaying 2 results from an estimated 2 matches for "f2z".

Did you mean: f2
2008 Nov 25
1
Efficient passing through big data.frame and modifying select
...> } > return(dframe) > } > > Times were > > > unix.time(z<-ResortCombinedFields(dframe)) > user system elapsed > 2.526 0.022 2.559 > > unix.time(f1z<-f1(dframe)) > user system elapsed > 0.509 0.000 0.508 > > unix.time(f2z<-f2(dframe)) > user system elapsed > 0.259 0.004 0.264 > > identical(z, f1z) > [1] TRUE > > identical(z, f2z) > [1] TRUE In R 2.7.0 (April 2008) f1() and f2() both take time proportional to nrow(dframe), while your original ResortCombinedFields() takes time pro...
2009 Mar 09
5
Help
...gt; >>> 2.526 0.022 2.559 > > >>> > > >>> > unix.time(f1z<-f1(dframe)) > > >>> > > >>> user system elapsed > > >>> 0.509 0.000 0.508 > > >>> > > >>> > unix.time(f2z<-f2(dframe)) > > >>> > > >>> user system elapsed > > >>> 0.259 0.004 0.264 > > >>> > > >>> > identical(z, f1z) > > >>> > > >>> [1] TRUE > > >>> > > >>&...