[R] Getting only label column of a data frame

[jim holtman]

Is this what you want:

> x
        V1   V2    V3    V4    V5    V6    V7    V8    V9
11145 14.3 17.1  31.2  41.7  45.8  49.8  68.6  70.6  72.9
3545  10.2 15.6  20.9  23.2  31.4  31.7  36.2  48.4  51.9
8951  15.2 17.5  20.0  21.4  32.4  49.7  51.3  58.3  58.9
11097 59.5 65.9 117.5 118.0 118.9 122.5 126.3 156.5 157.0
> x[,1]
[1] 14.3 10.2 15.2 59.5
> x[,1,drop=FALSE]
        V1
11145 14.3
3545  10.2
8951  15.2
11097 59.5
>

You probably need the 'drop=FALSE';  see ?'['

On Sun, Jun 22, 2008 at 10:16 PM, Gundala Viswanath <gundalav at gmail.com> wrote:
> Hi,
>
> How can I extract the label only from a given data frame.
>
> Fore example from this data frame.
>
>> print(dataf)
>          V1      V2      V3      V4      V5      V6      V7      V8      V9
> 11145    14.3    17.1    31.2    41.7    45.8    49.8    68.6    70.6    72.9
> 3545     10.2    15.6    20.9    23.2    31.4    31.7    36.2    48.4    51.9
> 8951     15.2    17.5    20.0    21.4    32.4    49.7    51.3    58.3    58.9
> 11097    59.5    65.9   117.5   118.0   118.9   122.5   126.3   156.5   157.0
>
> I want to get the label (first) column only:
>
> 11145
> 3545
> 8951
> 11097
>
> Is there a quick way to achieve that?
> I tried this but fail:
>
> mylable <- dataf[,1]
>
> Please advice.
>
> - Gundala Viswanath
> Jakarta - Indonesia
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?