[R] Importing CSV File

[Erik Iverson]

On 10/24/2010 04:57 PM, Jason Kwok wrote:
> I'm trying to import a CSV file into R and when it gets imported, the
> entries get numbered down the left side.  How do I get rid of that?

When you imported the CSV file into R, an object of class data.frame
was created, and since you did not assign it to a variable name,
(e.g., df1 <- read.csv(...) ), the object got printed.

A data.frame object is going to have a row.names attribute by definition,
which is what you're seeing.

In ?data.frame, we see documentation for the "row.names" argument:

  If ‘row.names’ was supplied as ‘NULL’
      or no suitable component was found the row names are the integer
      sequence starting at one (and such row names are considered to be
      ‘automatic’, and not preserved by ‘as.matrix’).

The method that prints out a data.frame is called print.data.frame,
and it does have an argument to suppress printing of the row.names.

The question is, why do you not want row.names?  Are they just
distracting you when printed, or is there some reason not to
carry them along in the object?

--Erik


>
> Thanks,
>
> Jason
>
> *>  read.csv(file="C:\\Program Files\\R\\Test Data\\sales.csv",head=TRUE)
>         Month Sales
> 1    January   422
> 2   February   151
> 3      March   451
> 4      April   175
> 5        May   131
> 6       June   307
> 7       July    47
> 8     August    12
> 9  September   488
> 10   October   122
> 11  November    54
> 12  December   244
>> *
>
> 	[[alternative HTML version deleted]]
>
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