R Error In Evalexpr Envir Enclos Object Not Found
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Error In Eval Expr Envir Enclos Object Not Found Predict
us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is error in eval(expr, envir, enclos) : object not found function a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error in eval(expr, envir, enclos) : object not found up vote 5 down vote attach dataset in r favorite 6 I am very new to coding in R, and cannot understand what is going wrong here. Any help will be much appreciated. data.train <- read.table("Assign2.WineComplete.csv",sep=",",header=T) # Building decision tree Train <- data.frame(residual.sugar=data.train$residual.sugar, total.sulfur.dioxide=data.train$total.sulfur.dioxide, alcohol=data.train$alcohol, quality=data.train$quality) Pre <- as.formula("pre ~ quality") fit <- rpart(Pre, method="class",data=Train) I am getting the following error : Error in eval(expr, envir, enclos) : object 'pre' not found r share|improve this question edited Apr 3
"error In Eval(expr, Envir, Enclos) : Object 'group' Not Found"
at 9:50 Roman Luštrik 34k1372121 asked Oct 19 '13 at 6:30 Rads 73118 1 You don't need the second or third lines of your code. Just do the read.table line then do: fit <- rpart(pre ~ quality, method="class",data=data.train). –Thomas Oct 19 '13 at 6:45 I tried what you asked me to do, but I still get the same error –Rads Oct 19 '13 at 7:12 Is there a upper/lower case problem here? I see 'Pre' declared but error is about 'pre'. –ako Oct 19 '13 at 7:31 No, if instead of all the statements, i just write data.train <- read.table("Assign2.WineComplete.csv",sep=",",header=T) and then fit <- rpart(pre ~ quality, method="class",data=data.train) , i get the same error –Rads Oct 19 '13 at 7:36 add a comment| 3 Answers 3 active oldest votes up vote 10 down vote accepted Don't know why @Janos deleted his answer, but it's correct: your data frame Train doesn't have a column named pre. When you pass a formula and a data frame to a model-fitting function, the names in the formula have to refer to columns in the data frame. Your Train has columns called residual.sugar, total.sulfur, alcohol and quality. You need to change either your formula or your
here for a quick overview of the site Help Center Detailed answers to any questions you might object not found r error have Meta Discuss the workings and policies of this site About error in eval(expr, envir, enclos) : y values must be 0 <= y <= 1 Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting
Error In Eval(expr Envir Enclos) Argument Is Missing With No Default
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 http://stackoverflow.com/questions/19463137/error-in-evalexpr-envir-enclos-object-not-found million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Predict Error in eval(expr, envir, enclos) : object not found in R up vote 2 down vote favorite I tried to predict several models using a previous function, but but I'm getting "Error in eval(expr, envir, enclos) : http://stackoverflow.com/questions/30471797/predict-error-in-evalexpr-envir-enclos-object-not-found-in-r object 'var.1' not found". That's is weird because var.1 is not in the dataframe. The code is: library(randomForest) library(ada) library(class) library(e1071) library(rpart) library(car) library(nnet) library(kknn) Consenso <- function(DF,VAR.DEP){ #entries are a dataframe and a dependent var N1 <- sample(DF,dim(DF)[1],replace=TRUE) N2 <- sample(DF,dim(DF)[1],replace=TRUE) N3 <- sample(DF,dim(DF)[1],replace=TRUE) N4 <- sample(DF,dim(DF)[1],replace=TRUE) N5 <- sample(DF,dim(DF)[1],replace=TRUE) mod.kknn <- train.kknn(VAR.DEP ~.,data=N1,kmax=trunc(sqrt(dim(DF)[1]))) mod.net <- nnet(VAR.DEP ~ ., data = N2, size = 10, rang = 0.1, decay = 5e-04, maxit = 400, trace = FALSE, MaxNWts = 20000) mod.tree <- rpart(VAR.DEP ~ ., data = N3) mod.sv <- svm(VAR.DEP ~ ., data = N4, kernel = "linear") mod.rf <-randomForest(VAR.DEP ~.,data= N5,ntree=400) lista.mod <- list("Modelo.kknn"=mod.kknn,"Modelo.Redes"=mod.net,"Modelo.Arboles"=mod.tree,"Modelo.SV"=mod.sv,"Modelo.RF"=mod.rf) return(lista.mod) } #Using the function pbiris <- Consenso(iris,iris$Species) #Make a prediction predict(pbiris$Modelo.kknn,iris) #Error in eval(expr, envir, enclos) : object 'Sepal.Width.1' not found #Var Sepal.Width.1 is not in the dataframe. What am I doing wrong? Any suggestions? Thanks. r predict share|improve this question edited May 27 '15 at 2:03 asked May 27 '15 at 1:45 Israel 7
eval(expr, envir, enclos) : object '' not found Messages sorted by: [ date ] [ thread ] https://stat.ethz.ch/pipermail/r-help/2011-March/272826.html [ subject ] [ author ] It looks like your column name http://renkun.me/blog/2014/12/03/tips-on-non-standard-evaluation-in-r.html has periods in it somewhere. Is your header separated by something other than commas? look at: names(data.sex) or test by "age" %in% names(data.sex) -------------------------------------- Jonathan P. Daily Technician - USGS Leetown Science Center 11649 Leetown Road Kearneysville WV, 25430 (304) 724-4480 "Is the room still a room when error in its empty? Does the room, the thing itself have purpose? Or do we, what's the word... imbue it." - Jubal Early, Firefly r-help-bounces at r-project.org wrote on 03/23/2011 09:31:40 AM: > [image removed] > > [R] ) Error in eval(expr, envir, enclos) : object '' not found > > mipplor > > to: > > r-help > > 03/23/2011 10:11 error in eval AM > > Sent by: > > r-help-bounces at r-project.org > > > datafilename="E:/my documents/r/sex/bysex1.csv" > > data.sex=read.table(datafilename,header=T) > > data.sex > y.sex.age.region.c.n > 1 1980,F,A,N,-18.15,13.61 > 2 1980,F,A,N,-18.61,13.04 > 3 1980,F,A,N,-18.81,12.32 > 4 1990,F,A,N,-21.12,11.7 > 5 1990,F,A,N,-20.77,11.58 > 6 1990,F,A,N,-21.6,13.34 > 7 1990,F,A,N,-21.78,12.6 > > > model.anova<-aov(c~age*sex,data=data.sex) > Error in eval(expr, envir, enclos) : object 'age' not found > > > i just wanna do a anova test. but the error message is as above,,, > what should i do to shoot this problem ? Should i define the age? > > > -- > View this message in context: http://r.789695.n4.nabble.com/Error- > in-eval-expr-envir-enclos-object-not-found-tp3399503p3399503.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. Previous message: [R] ) Error in eval(expr, envir, enclos) : object '' not found Next message: [R] ) Error in eval(expr, envir, enclos) : object '' not found Messages sorted by: [ date ] [ thr
of my favorite features of R is its meta-programming facilities. It can be simply demonstrated by the following examples. An ordinary use of R is to do statistical computing. We can evaluate something like sin(0) [1] 0 Meta-programming in R allows users to manipulate the expression to evaluate. We can use quote to create an object that represents a function call. quote(sin(0)) sin(0) In this way, sin(0) is not evaluated but parsed as a call object which basically can be represented as a list of function name and the arguments. as.list(quote(sin(0))) [[1]] sin [[2]] [1] 0 Now we can use some functions to manipulate the expression so that we can alter the expression to evaluate. expr <- quote(sin(0)) expr[[1L]] <- quote(cos) expr cos(0) Now we can see the expression is modified. This feature, as stated in the official documentation, is computing on language, that is, R not only is able to compute on literal values, but also on language itself. Then what can we do with the modified expression? We can evaluate it using eval() as if we do in the console. eval(expr) [1] 1 The meta-programming feat