On Dec 2, 2009, at 4:01 PM, Wells Oliver wrote:
I have a query which returns a data set like so:
salaries
yearID POS pct
1 2009 RF 203
2 2009 DH 200
3 2009 1B 198
4 2009 3B 180
5 2009 LF 169
6 2009 SS 156
7 2009 CF 148
8 2009 2B 97
9 2009 C 86
10 2008 DH 234
11 2008 1B 199
12 2008 RF 197
13 2008 3B 191
14 2008 SS 180
15 2008 CF 164
16 2008 LF 156
17 2008 2B 104
18 2008 C 98
I'd like to make a vector for all data for a given position, so for
example
here I'd like all yearID a
nd pct for POS 'RF which should look like:
salaries[salaries$POS == 'RF', c("yearID", "pct") ]
First "term" inside the extractor function is a logical index, the
second specified the columns desired.
yearID pct
1 2009 203
2 2008 197
Apologies if I'm mangling terminology here.
--
Wells Oliver
we...@submute.net
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