search for: fewrownames

...on): rindex: quick indexing of large objects (currently only character, see ?index) regtest: some first support for automated regression testing (heavily used in \dontshow{} section of ?index) With rindex you can for example i <- index(rownames(someDataFrame)) # then this someDataFrame[match(fewRowNames, i),] # is much faster than that someDataFrame[match(fewRowNames, rownames(someDataFrame)),] # which still is much faster than someDataFrame[fewRowNames, ] # the latter being surprisingly slow as it can be worked around by match (even without indexing) I'd appreciate any comments, especially o...