subset(data1,cast==33&(depth %in% c(1,20,100))
Sent from my iPhone
On Sep 5, 2009, at 11:58, John Casey <johnrca...@hotmail.com> wrote:
Hello all,
I am new to R but have some experience with MATLAB and am trying
to make the switch. I generally find the two languages easy to adapt
but there are a few routine tasks which I would like to run smoother
in R and I am having trouble finding a help resource. Could someone
suggest a guide to filtering, selecting, sorting, and processing
biological matrix data? Here is a rudimentary example of what I'm
after [ocean research cruise- data.frame<-example]:
Cruise, dec yr, station, cast, depth, data1
1, 2007.65, 9, 29, 1, 105.04
1, 2007.65, 9, 29, 10, 104.91
1, 2007.65, 9, 29, 20, 101.43
1, 2007.65, 9, 29, 50, 100.68
1, 2007.65, 9, 29, 100, 100.09
1, 2007.69, 11, 33, 1, 107.32
1, 2007.69, 11, 33, 10, 105.94
1, 2007.69, 11, 33, 20, 102.19
1, 2007.69, 11, 33, 50, 101.27
1, 2007.69, 11, 33, 100, 100.15
Let's say I would like to select data1 from cast 33 at 1, 20, and
100m depth... how would I go about this?
Thanks in advance for helping out a greenhorn!
John
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