On Jul 5, 2011, at 2:10 PM, Sam Steingold wrote:
* David Winsemius <qjvafrz...@pbzpnfg.arg> [2011-07-05 13:21:57
-0400]:
On Jul 5, 2011, at 12:53 PM, Sam Steingold wrote:
I am confused by the way the indexing works.
Actually I suspect you may be confused by how factors work. See
below.
probably both :-(
being a lisper, I thought about factors as lisp symbols (and thus
thought that they would be accepted everywhere strings are).
Have you considered:
ysmd.table[ as.character( ysmd$X.stock[[100]]) ]
It appears that ysmd$X.stock[[100]] is a factor, and if so, you
probably
want the character value that its numeric representation points to.
indeed:
as.character(ysmd$X.stock[[100]])
[1] "FLO"
however,
ysmd.table[as.character(ysmd$X.stock[[100]])]
<hash> containing 0 key-value pair(s).
NA : NULL
so, as.character is not the answer.
My error. Note the difference in indexing functions. "[" is not "[["
ysmd.table[["FLO"]]
X.stock market.cap X52.week.low X52.week.high
X3.month.average.daily.volume
100 FLO 2.984e+09 15.3133
22.37 1021580
X50.day.moving.average.price
100 21.3769
So you are here demonstrating that you should be using "[["
This is, of course, guesswork because you have not disclosed what
package hash` comes from, so I do not have the benefit of looking at
its help page.
I just did this:
library(hash);
hash-2.0.1 provided by Open Data.
--
David Winsemius, MD
West Hartford, CT
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