Error: object of type 'closure' is not subsettable

[mikeozga]

Hey so I've ran the following code from a dataset I loaded. I keep getting the same error on the last 2 lines and am not sure how to fix it. Any suggestions?

setwd("Downloads")
pitcher = read.csv("FanGraphs Leaderboard (27).csv",fileEncoding = "UTF-8-BOM")
attach(pitcher)
str(pitcher)
cor(subset(pitcher,select=-c(Season,Name,Team,playerid)))
goodColumns = c("W","L","IP","ER","HR","BB","SO","WAR")
library(caret)
inTrain = createDataPartition(pitcher$WAR,p=0.7,list=FALSE)
training <- data[inTrain,goodColumns]
testing = data[-inTrain,goodColumns]

Thanks

[jcblum]

Hi @mikeozga! Welcome!

Your code hasn't actually created an object named data, so R is falling back to the function data() (used for loading built-in datasets). A function is called a "closure" by R.

Were you maybe adapting this code from an example somewhere? I'm not quite sure what you're doing here and I can't run your code (it's not reproducible as-is, since it relies on files local to your system), but I suspect you need to have the name of your data frame pitcher in the place of data.

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[jcblum]

One small tip, unrelated to your question: using attach() on a data frame can create a lot of confusion, since it basically adds invisible variable names to your session. This code isn't even gaining any convenience from attach()-ing, since you're using subset() (which already lets you use bare column names) or fully qualifying your columns (e.g., pitcher$WAR). So I'd recommend skipping the attach(). It's likely to create more pain than it's worth.