Brand new user: Data will not appear in my summary or plot

[NicoleJ]

Hi I am a very new Rstudio user, trying to use R to complete an assignment per the instructions of my class but we were given virtually no class support and my teacher is non-responsive. We were given this code, however, when I run the summary, I do not receive the same data that the instructor does ( a second column of data that says A:14 above B:46). I have attached a photo of what I get. It seems like I have to define what to do with the data but I don't know how. Any help would be much appreciated. Thank you!

prefsAB = read.csv("prefsAB.csv")
View(prefsAB)
prefsAB$Subject = factor(prefsAB$Subject) # convert to nominal factor
summary(prefsAB)
plot(prefsAB$Pref)

[NicoleJ]

Here is the entire environment in case it helps...

[jlugarrancho]

Hi Nicole!

I think that there are two solutions.

One is convert into a factor the variable Pref before plotting it.

prefsAB$Pref <- factor(prefsAB$Pref)

The second solution is write the argument stringsAsFactors = TRUE in the read.csv() function.

prefsAB <- read.csv("prefsAB.csv", stringsAsFactors = TRUE)

This is because in the versions equal or bigger than R 4.0.0, read.csv() and the others functions for import data don't coerce into factors the strings. Maybe your teacher made this exercise before these actualizations.

You're welcome.

Cheers!

[NicoleJ]

Thank you! This worked! I'm taking an online class that references a MUCH older version of R so I suspect you are right and am now incredibly nervous for the other 900 lines of code...
Thanks again!

[jlugarrancho]

I am very happy that you have found it useful!

As I can remember this is one of the latest most important changes in R base, maybe with some luck this could be the only type of problem that you could find. Good luck!

If you find that your teacher create a data frame with the data.frame() function, maybe you will have the same problem, you can solve this writing the argument stringsAsFactors = TRUE inside the function data.frame().

You're welcome! We are here to help us in what we can.

Greetings!