Random Forest Reading N/A's, I don't see them
On Dec 15, 2011, at 2:39 PM, Lost in R wrote:
After checking the original data in Excel for blanks and running Summary(cm3) to identify any null values in my data, I'm unable to identify an instances. Yet when I attempted to use the data in Random Forest, I get the following error. Is there something that Random Forest is reading as null which is not actually null? Is there a better way to check for this?
library(randomForest) system.time(
+ rf1 <- randomForest(as.matrix(
# Are you aware of the effect of using as.matrix(..) on the storage mode?
cm3[,c(2:length(colnames(cm3)))]),
# that was the x argument
+ cm3[,1],
# The y variable
data=cm3,
# That's odd. You already offered the data objects. I wonder what the function will do with that?
ntree=50) + ) *Error in randomForest.default(as.matrix(cm3[, c(2:length(colnames(cm3)))]), : NA/NaN/Inf in foreign function call (arg 1) In addition: Warning message: In storage.mode(x) <- "double" : NAs introduced by coercion
I can see two potential sources of such an error.
Timing stopped at: 1.33 0.01 1.35 * Thanks in advance, Mike -- View this message in context: http://r.789695.n4.nabble.com/Random-Forest-Reading-N-A-s-I-don-t-see-them-tp4201546p4201546.html Sent from the R help mailing list archive at Nabble.com.
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