Re: [R] Using 'aggregate' when dependent on row value increments

2009-04-30 Thread Michael A. Miller
> "jim" == jim holtman writes: > Is this what you want: >> aggregate(x$Sim_1986, list(trunc(x$Latitude)), mean) > Group.1 x 1 82 55.04276 2 83 60.26186 3 84 39.40297 4 85 > 22.12000 >> You could also use cut to convert Latitude to a factor: aggregate(x$Sim_1986, cut(

Re: [R] Using 'aggregate' when dependent on row value increments

2009-04-30 Thread Steve Murray
Many thanks for the very useful responses in such a short time. I'm not a former SAS user - more a naive R user who didn't realise that a sort wasn't necessary! Jim, your solution worked really well - thanks. Thanks again for the great solutions. Steve ___

Re: [R] Using 'aggregate' when dependent on row value increments

2009-04-30 Thread jim holtman
Is this what you want: > aggregate(x$Sim_1986, list(trunc(x$Latitude)), mean) Group.1x 1 82 55.04276 2 83 60.26186 3 84 39.40297 4 85 22.12000 > On Thu, Apr 30, 2009 at 11:50 AM, Steve Murray wrote: > > Dear all, > > I have a data frame of three columns, which I ha

[R] Using 'aggregate' when dependent on row value increments

2009-04-30 Thread Steve Murray
Dear all, I have a data frame of three columns, which I have sorted by Latitude as follows: > test2[60:80,] Latitude Longitude Sim_1986 6194885.25-29.25 2.175345 6195785.25-28.75 8.750486 6196785.25-28.25 33.569305 6197785.25-27.75 23.702572 6198885.