



Dear all,    Have tried using random forest for classfication and this is the code i wrote exactly: trial.rf<-randomForest(Type ~., data=trial) where Type is a column and determines the type and the trial is the data matrix.  I keep getting this error: Error in eval (exprs, envir, enclos): object '117_at' not found.  Where 117_at is a name of the first column.  I tried removing this column but it gave me the same error for the next column. Any help? Regards,salwa  		 	   		  
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