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i am doing some regression models in grad school. I recently stumbled over R. I have my .csv file in R and the regression works out fine. But I don't know how to extract the variables in the data frame so that I can use

summary(visits)

I get the error

Error in summary(visits) : object 'visits' not found

I appreciate every answer. Thanks

Edit 9/5: My code looks something like this:

pool <- read.csv("Econ205A_Assigment_4_9.csv",sep=";", dec=",")
poolreg <- lm(visits ~ fee + pop + income, data = pool)
summary(visits)

The data frame looks like this

city visits fee income pop 1 1 168590 0.00 20600 36879 2 2 179599 0.00 33400 64520

My problem is that R doesn't treat any of the different observations as variables. So I get the error shown above.

Philip Schnaars
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    Welcome to SO. Please provide a reproducible example for this example, as described here: http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example Otherwise this question is essentially impossible to answer. – Drew Steen Sep 03 '13 at 23:55
  • Sorry about that. I hope me edit made things more clear. – Philip Schnaars Sep 05 '13 at 17:02

1 Answers1

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To get a summary of variables in database use, 

mydata<-read.csv("yournameofcsvfile.csv") # reading the csv file assuming the csv file is in your working directory

summary(mydata$visits) # assuming visits is a variable

Or: 

 summary(mydata["visits"])
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