On May 12, 2010, at 5:31 PM, Changbin Du wrote:
fit.dimer <- rpart(as.factor(out) ~ ., method="class", data=p_df)
fit.dimer$frame[, "var"]
[1] NE WC <leaf> TA <leaf> <leaf> WG WD WW WC
[11] <leaf> <leaf> <leaf> CT <leaf> FC <leaf> YG QT
<leaf>
[21] <leaf> <leaf> NW DP DY <leaf> SK <leaf> <leaf>
<leaf>
[31] <leaf>
401 Levels: <leaf> AA AC AD AE AF AG AH AI AK AL AM AN AP AQ AR AS
AT AV ...
YY
at<-grep("<leaf>", fit.dimer$frame[, "var"], value=FALSE,
ignore.case=TRUE)
fit.dimer$frame[-at, "var"]
[1] NE WC TA WG WD WW WC CT FC YG QT NW DP DY SK
401 Levels: <leaf> AA AC AD AE AF AG AH AI AK AL AM AN AP AQ AR AS
AT AV ...
YY
unique(fit.dimer$frame[-at, "var"])
[1] NE WC TA WG WD WW CT FC YG QT NW DP DY SK
401 Levels: <leaf> AA AC AD AE AF AG AH AI AK AL AM AN AP AQ AR AS
AT AV ...
YY
HI, Dear R community,
I tried to exact the variables used in tree construction, I used above
codes. Is there a way to remove the "401 levels......"?
Are you trying to get the number of levels to equal the present set,
then:
?factor
> af <- factor(letters[1:10] ,levels=letters[1:20])
> af
[1] a b c d e f g h i j
Levels: a b c d e f g h i j k l m n o p q r s t
> factor(af)
[1] a b c d e f g h i j
Levels: a b c d e f g h i j
If you are trying to convert to a vector then:
?as.character
--
David.
How to add " " around each variables? I want them to become "NW",
"WC",
etc.
Thanks so much!
--
Sincerely,
Changbin
--
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