[R] Accessing member

[John Kane]

Assuming the data set is called xx

   subset (xx, xx$V1=="AB") 

or 
   xx[1,]

if you now AB is the first row of the data.
--- On Mon, 12/28/09, Nick Torenvliet <nick.torenvliet at gmail.com> wrote:

> From: Nick Torenvliet <nick.torenvliet at gmail.com>
> Subject: [R] Accessing members
> To: r-help at r-project.org
> Received: Monday, December 28, 2009, 6:14 PM
> Consider the following....
> 
> > fileLines
>       V1   
>    V2    V3    V4 
>    V5     V6   
> V7     V8
> 1     AB 20091224 156.0 156.0 154.00
> 154.00    55   1198
> 2   AB.C 20091224 156.0 156.0 156.00
> 156.00     0      0
> 3  ABF10 20091224 156.0 156.0 156.00 156.00 
>   55    444
> 4  ABH10 20091224 156.0 156.0 156.00 156.00 
>    0    749
> 5  ABH11 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 6  ABH12 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 7  ABK10 20091224 157.2 157.2 157.20 157.20 
>    0      5
> 8  ABK11 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 9  ABN10 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 10 ABN11 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 11 ABV10 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 12 ABV11 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 13 ABZ10 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 14 ABZ11 20091224 157.2 157.2 157.20 157.20 
>    0      0
> 15    RS 20091224 395.0 395.0 381.42 381.42 12918
> 100618
> 16  RS.C 20091224 395.0 399.1 395.00 398.70 
> 1680      0
> 17 RSF10 20091224 395.0 399.1 395.00 398.70 
> 2277   3081
> 18 RSF11 20091224 420.3 420.3 420.30 420.30   
> 50    203
> 19 RSF12 20091224 415.5 415.5 415.50 415.50 
>    0      0
> 20 RSH10 20091224 401.1 403.9 399.50 403.60 
> 9925  79548
> 21 RSH11 20091224 419.2 419.2 419.20 419.20 
>    0    193
> 22 RSK10 20091224 406.9 409.9 406.40
> 409.90   264   5769
> 23 RSK11 20091224 415.5 415.5 415.50 415.50 
>    0      0
> 24 RSN10 20091224 414.7 415.2 410.00
> 415.20   189   6391
> 25 RSN11 20091224 415.5 415.5 415.50 415.50 
>    0      2
> 26 RSX10 20091224 414.9 417.9 413.00
> 417.30   213   5431
> 27 RSX11 20091224 415.5 415.5 415.50 415.50 
>    0      0
> 28    WF 20091224 363.0 363.0 363.00 363.00 
>    0      0
> 29    WW 20091224 152.0 152.0 152.00 152.00 
>    0      0
> 
> > attributes (fileLines)
> $names
> [1] "V1" "V2" "V3" "V4" "V5" "V6" "V7" "V8"
> 
> $class
> [1] "data.frame"
> 
> $row.names
>  [1]  1  2  3  4  5  6 
> 7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
> 24
> 25
> [26] 26 27 28 29
> 
> > fileLines[1,2]
> [1] 20091224
> As expected!
> 
> > fileLines[1,3]
> [1] 156
> As expected!
> 
> > fileLines[1,1]
> [1] AB
> 29 Levels: AB AB.C ABF10 ABH10 ABH11 ABH12 ABK10 ABK11
> ABN10 ABN11 ... WW
> Doh!
> 
> How do I access the "AB" element directly?
> 
> Nick
> 
>     [[alternative HTML version deleted]]
> 
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> and provide commented, minimal, self-contained,
> reproducible code.
> 


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