Re: [R] search a value in variables dataset

From: ronggui <042045003_at_fudan.edu.cn>
Date: Fri 21 Oct 2005 - 00:29:07 EST


use logical index.

> my.reducedID<-read.table(file.choose())
> head(my.reducedID)

     V1 V2 V3 V4 V5 V6 V7 V8 V9

[1,]  1  0  0  1 14  3  1  0  2
[2,]  2  0  0  1 14  3  1  0  2
[3,]  0  1  0  1 14  2  1  0  2
[4,]  0  0  1  1 14  3  1  0  2
[5,]  0  1  1  0 14  2  1  0  2
[6,]  0  0  0  1 14  3  1  0  2

> attach(my.reducedID)
> my.reducedID[(V1==0 & V5==14 & V6==2),]

      V1 V2 V3 V4 V5 V6 V7 V8 V9

[3,]   0  1  0  1 14  2  1  0  2
[5,]   0  1  1  0 14  2  1  0  2
[29,]  0  0  0  1 14  2  1  0  2


>Dear R-list,
>I have a dataset, say (the real dataset is 20 columns,110200 rows).
>
> > my.reducedID
> V1 V2 V3 V4 V5 V6 V7 V8 V9
> [1,] 1 0 0 1 14 3 1 0 2
> [2,] 2 0 0 1 14 3 1 0 2
> [3,] 0 1 0 1 14 2 1 0 2
> [4,] 0 0 1 1 14 3 1 0 2
> [5,] 0 1 1 0 14 2 1 0 2
> [6,] 0 0 0 1 14 3 1 0 2
> [7,] 0 0 0 1 0 3 1 0 2
> [8,] 0 0 0 1 1 3 1 0 2
> [9,] 0 0 0 1 2 3 1 0 2
>[10,] 0 0 0 1 3 3 1 0 2
>[11,] 0 0 0 1 4 3 1 0 2
>[12,] 0 0 0 1 5 3 1 0 2
>[13,] 0 0 0 1 6 3 1 0 2
>[14,] 0 0 0 1 7 3 1 0 2
>[15,] 0 0 0 1 8 3 1 0 2
>[16,] 0 0 0 1 9 3 1 0 2
>[17,] 0 0 0 1 10 3 1 0 2
>[18,] 0 0 0 1 11 3 1 0 2
>[19,] 0 0 0 1 12 3 1 0 2
>[20,] 0 0 0 1 13 3 1 0 2
>[21,] 0 0 0 1 15 3 1 0 2
>[22,] 0 0 0 1 16 3 1 0 2
>[23,] 0 0 0 1 17 3 1 0 2
>[24,] 0 0 0 1 18 3 1 0 2
>[25,] 0 0 0 1 19 3 1 0 2
>[26,] 0 0 0 1 20 3 1 0 2
>[27,] 0 0 0 1 14 0 1 0 2
>[28,] 0 0 0 1 14 1 1 0 2
>[29,] 0 0 0 1 14 2 1 0 2
>[30,] 0 0 0 1 14 4 1 0 2
> >
>
>I want to search a value in variables, say V1=0, V5=14 and V6=2.
>The result should look like
> V1 V2 V3 V4 V5 V6 V7 V8 V9
> [3,] 0 1 0 1 14 2 1 0 2
> [5,] 0 1 1 0 14 2 1 0 2
>[29,] 0 0 0 1 14 2 1 0 2
>
>I can do this with: my.reducedID[c(3,5,29),]
>Because I have very large dataset I can not make this manual.
>Then I need the ID of row did not change, I mean like,
>[3,]
>[5,]
>[29,]
>In dataset this is about ID our customers.
>I was wondering if anyone give me a trick to make simple.
>Thanks you very much for any suggestions.
>
>Best, Muhammad Subianto
>
>______________________________________________
>R-help@stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

2005-10-20



Deparment of Sociology
Fudan University

My new mail addres is ronggui.huang@gmail.com Blog:http://sociology.yculblog.com



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Oct 21 01:09:45 2005

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