thr3ads.net - R help - [R] Accessing members [Dec 2009]

If this information is useful, please help other people find it:
Share via:

Nick Torenvliet

2009-Dec-28 23:14 UTC

[R] Accessing members

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]]

Thomas S. Dye

2009-Dec-28 23:48 UTC

head link

[R] Accessing members

Hi Nick,

Your first column is being stored as a factor.  You can either take  
care when creating the matrix to keep the values in this column as  
characters, or you might want to convert the result using  
as.character().

HTH,
Tom

On Dec 28, 2009, at 1:14 PM, Nick Torenvliet wrote:
> 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]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

John Kane

2009-Dec-29 00:01 UTC

head link

[R] Accessing member

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]]
> 
> ______________________________________________
> R-help at r-project.org
> mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.
> 

      __________________________________________________________________
Looking for the perfect gift? Give the gift of Flickr! 

http://www.flickr.com/gift/

GlenB

2009-Dec-29 01:40 UTC

head link

[R] Accessing members

This is a result of how R treats factors.

There's more than one way to do what I think you're asking for.

I've constructed a smaller version of your data frame to illustrate one
quick way if that's all you need:
> smdat<-
>
data.frame(V1=c("AB","AB.C","ABF10"),V2=rep("20091224",3),V3=rep(156.0,3))
> smdat     V1       V2  V3
1    AB 20091224 156
2  AB.C 20091224 156
3 ABF10 20091224 156> smdat[1,][1]  V1
1 AB

-- 
View this message in context:
http://n4.nabble.com/Accessing-members-tp990043p990097.html
Sent from the R help mailing list archive at Nabble.com.

David Winsemius

2009-Dec-29 01:55 UTC

head link

[R] Accessing members

On Dec 28, 2009, at 5:14 PM, Nick Torenvliet wrote:
> 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.
.>
>> 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?
You already did access that element directly. You were given a bit  
more information than you expected but the value of fileLines[1,1] is  
"AB" and you were also advised that such value was one of 29 possible
values for the particular factor set of which it is a member.


-- 
David
>
> Nick
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

Apparently Analagous Threads

Search for more apparently analagous threads

R help - Dec 2009 - Accessing members

[R] Accessing members

[R] Accessing members

[R] Accessing member

[R] Accessing members

[R] Accessing members

Apparently Analagous Threads