CODEWITHSUNDEEP
r
JohnK
JohnK

Reputation: 1039

Trouble loading a dataset in R

I have downloaded the package SemiPar and I have been trying to attach the dataset fuel.frame, using the command data(fuel.frame), but without sucess. The error I have been getting is: 

Error in read.table(zfile, header = TRUE, as.is = FALSE) : 
  more columns than column names
In addition: Warning messages:
1: In read.table(zfile, header = TRUE, as.is = FALSE) :
  line 1 appears to contain embedded nulls
2: In read.table(zfile, header = TRUE, as.is = FALSE) :
  line 5 appears to contain embedded nulls
3: In read.table(zfile, header = TRUE, as.is = FALSE) :
  incomplete final line found by readTableHeader on 'C:/...

Could you please tell me what is wrong here? I have tried to look for solutions online but it seems the package works for everyone besides myself.

My sessionInfo()

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base 


other attached packages:
[1] SemiPar_1.0-4.1

loaded via a namespace (and not attached):
[1] cluster_1.15.3  grid_3.1.1      lattice_0.20-29 MASS_7.3-33     nlme_3.1-117   
[6] tools_3.1.1

Thank you.

Upvotes: 1

Views: 570

Answers (1)

IRTFM
IRTFM

Reputation: 263301

The "fuel.frame" file is actually in the ../SemiPar/data/ directory wherever your library is. You can use the .libPaths() function. For me it returns:

> .libPaths()
[1] "/Library/Frameworks/R.framework/Versions/3.1/Resources/library"

If you look in there you should see "fuel.frame.txt.gz" which tells you that it's a gzipped file that will expand to a text file (which is what the data() call is doing before passing it to read.table() ). The top of it looks like:

            car.name         Weight Disp. Mileage     Fuel    Type 
           "Eagle Summit 4"   2560    97      33 3.030303   Small
            "Ford Escort 4"   2345   114      33 3.030303   Small
           "Ford Festiva 4"   1845    81      37 2.702703   Small
            "Honda Civic 4"   2260    91      32 3.125000   Small
          "Mazda Protege 4"   2440   113      32 3.125000   Small
         "Mercury Tracer 4"   2285    97      26 3.846154   Small
          "Nissan Sentra 4"   2275    97      33 3.030303   Small
         "Pontiac LeMans 4"   2350    98      28 3.571429   Small

As you can see your error message is not correct about my copy. So you may want to use your unnamed system to expand the .gz file and investigate. (I was not getting an error with my R 3.1.1 (SnowLeopard build) running in OSX 10.7.5.) With my setup this also succeeds:

 data('fuel.frame', 
     lib.loc='/Library/Frameworks/R.framework/Versions/3.1/Resources/library/')

Upvotes: 4

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