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Required fields*

Rev

5

That syntax does work if you store your data in a data.table, instead of a data.frame: require(data.table); my.dt <- data.table(my.data); my.dt[order(age)] This works because the column names are made available inside the [] brackets.

Frank
– Frank

2013-09-02 19:34:01 +00:00
Commented Sep 2, 2013 at 19:34
1

I don't think the downvote is necessary here, but neither do I think this adds much to the question at hand, particularly considering the existing set of answers, some of which already capture the requirement with data.frames to either use with or $.

A5C1D2H2I1M1N2O1R2T1
– A5C1D2H2I1M1N2O1R2T1

2014-02-14 11:16:52 +00:00
Commented Feb 14, 2014 at 11:16
2

upvote for do.call this makes short work of sorting a multicolumn data frame. Simply do.call(sort, mydf.obj) and a beautiful cascade sort will be had.

AdamO
– AdamO

2016-05-25 04:28:53 +00:00
Commented May 25, 2016 at 4:28

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