Re: [R] Grouping rows of data by day

2010-04-19 Thread Henrique Dallazuanna
Try this: aggregate(DF[c('data1','data2')], list(gsub('\\..*', '', DF$time)), FUN = sum) On Mon, Apr 19, 2010 at 12:00 PM, jennyed wrote: > > Hi all, > > I have a set of data in hourly time steps with each row identified as > time data column1 data column2 > 1

[R] Grouping rows of data by day

2010-04-19 Thread jennyed
Hi all, I have a set of data in hourly time steps with each row identified as time data column1 data column2 1 1.042 1.083