[R] Why can't I access this type?

[Bert Gunter]

Your data frame contains no column named "Name" .

Maybe what you want is

rownames(all.states)[all.state$Frost>150]

However, what you clearly need to do is stop posting until you have
done your homework by spending some time with one of the many good R
tutorials that are out there (possibly Intro to R, which ships with R,
though it's getting a bit dated now). This appears to be a very basic
question. If you are going through a tutorial and got stuck here, then
note that row names are an attribute of the data frame, not a column
name of one of its columns. See ?rownames and the links therein for
more info.

Cheers,
Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
Clifford Stoll




On Sun, Mar 22, 2015 at 7:39 AM, Yves S. Garret
<yoursurrogategod at gmail.com> wrote:
> Hi, I'm just learning my way around R.  I got a bunch of states and would
> like to access to get all of the ones where it's cold.  But when I do the
> following, I will get the following error:
>
>> all.states <- as.data.frame(state.x77)
>> cold.states <- all.states[all.states$Frost > 150, c("Name", "Frost")]
> Error in `[.data.frame`(all.states, all.states$Frost > 150, c("Name",  :
>   undefined columns selected
>
> I don't get it.  When I look at all.states, this is what I see:
>
>> str(all.states)
> 'data.frame':   50 obs. of  8 variables:
>  $ Population: num  3615 365 2212 2110 21198 ...
>  $ Income    : num  3624 6315 4530 3378 5114 ...
>  $ Illiteracy: num  2.1 1.5 1.8 1.9 1.1 0.7 1.1 0.9 1.3 2 ...
>  $ Life Exp  : num  69 69.3 70.5 70.7 71.7 ...
>  $ Murder    : num  15.1 11.3 7.8 10.1 10.3 6.8 3.1 6.2 10.7 13.9 ...
>  $ HS Grad   : num  41.3 66.7 58.1 39.9 62.6 63.9 56 54.6 52.6 40.6 ...
>  $ Frost     : num  20 152 15 65 20 166 139 103 11 60 ...
>  $ Area      : num  50708 566432 113417 51945 156361 ...
>
> What am I messing up?
>
>         [[alternative HTML version deleted]]
>
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