CODEWITHSUNDEEP
rdataframedataset
ahajib
ahajib

Reputation: 13520

Load R datasets in dataframes

I am new with R and trying to use some of the datasets which exits within the R itself such as AirPassengers. I have looked at different code samples and in all of them usually data is loaded like:

data(AirPassengers)

However, I was wondering if it is possible to load this into a dataframe so then I can figure out the columns data types. I have tried summary but that only gives back dataset properties such as Mean, Min, etc. I also tried the following:

df <- data(AirPassengers)

Which is not working either.

Thanks

Upvotes: 0

Views: 3998

Answers (1)

dayne
dayne

Reputation: 7794

Calling data(AirPassengers) adds a promise pointing to AirPassengers to your global environment. Once you use the AirPassengers object it will be loaded into your global environment. You can either just use the AirPassengers object like you would any object, or you can copy it to another variable, e.g.:

data(AirPassengers)
dat <- AirPassengers

If you run class on AirPassengers you will see that AirPassengers is not a data.frame. Try looking at the differences here:

class(AirPassengers)
# [1] "ts"
data(mtcars)
class(mtcars)
# [1] "data.frame"
summary(mtcars)
#     mpg             cyl             disp             hp       
# Min.   :10.40   Min.   :4.000   Min.   : 71.1   Min.   : 52.0  
# 1st Qu.:15.43   1st Qu.:4.000   1st Qu.:120.8   1st Qu.: 96.5  
# Median :19.20   Median :6.000   Median :196.3   Median :123.0  
# Mean   :20.09   Mean   :6.188   Mean   :230.7   Mean   :146.7  
# 3rd Qu.:22.80   3rd Qu.:8.000   3rd Qu.:326.0   3rd Qu.:180.0  
# Max.   :33.90   Max.   :8.000   Max.   :472.0   Max.   :335.0  
# drat             wt             qsec             vs        
# Min.   :2.760   Min.   :1.513   Min.   :14.50   Min.   :0.0000  
# 1st Qu.:3.080   1st Qu.:2.581   1st Qu.:16.89   1st Qu.:0.0000  
# Median :3.695   Median :3.325   Median :17.71   Median :0.0000  
# Mean   :3.597   Mean   :3.217   Mean   :17.85   Mean   :0.4375  
# 3rd Qu.:3.920   3rd Qu.:3.610   3rd Qu.:18.90   3rd Qu.:1.0000  
# Max.   :4.930   Max.   :5.424   Max.   :22.90   Max.   :1.0000  
# am              gear            carb      
# Min.   :0.0000   Min.   :3.000   Min.   :1.000  
# 1st Qu.:0.0000   1st Qu.:3.000   1st Qu.:2.000  
# Median :0.0000   Median :4.000   Median :2.000  
# Mean   :0.4062   Mean   :3.688   Mean   :2.812  
# 3rd Qu.:1.0000   3rd Qu.:4.000   3rd Qu.:4.000  
# Max.   :1.0000   Max.   :5.000   Max.   :8.000

AirPassengers is a specific type of vector called a time-series. Look at ?ts for more information.

Upvotes: 4

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