[R] Odp: Cbind query

[Petr PIKAL]

Hi

I am a bit puzzled what you want to do?

r-help-bounces at r-project.org napsal dne 22.10.2010 13:06:17:

> 
> I am new to R and request your kind help.
> 
> I have a table like the one below, 
>    one         two
> 1  apple      fruit
> 2  ball         game
> 3  chair       wood
> 4  wood       plain
> 5  fruit        banana
> 6  cloth       silk
> 
> Note: duplicate entries are there
> 
> the task is to create relations to each each row entries, like "apple ->
> fruit" . when I tried to combine column1 with column 2 (one, two), using
> "cbind" the string is changed to numerical value...something like this
>         [,1] [,2]
>    [1,]   10   53
>    [2,]   25  562
>    [3,]   25  462
>    [4,]   25 1045
>    [5,]   25  488
>    [6,]   26 1062
>    [7,]   27  951
>    [8,]   27  144
>    [9,]   27  676
>   [10,]   27  486

l1<-sample(letters[1:5], 10, rep=T)
l2<-sample(LETTERS[1:5], 10, rep=T)
 cbind(l1, l2)
      l1  l2 
 [1,] "a" "A"
 [2,] "a" "A"

 [9,] "c" "C"
[10,] "b" "B"
dat<-data.frame(l1, l2)

changes character values to factor
dat
   l1 l2
1   a  A
2   a  A

9   c  C
10  b  B
str(dat)
'data.frame':   10 obs. of  2 variables:
 $ l1: Factor w/ 4 levels "a","b","c","d": 1 1 4 1 4 1 4 1 3 2
 $ l2: Factor w/ 5 levels "A","B","C","D",..: 1 1 4 4 4 2 4 5 3 2

and cbind turns them to numeric

cbind(dat$l1, dat$l2)
      [,1] [,2]
 [1,]    1    1
 [2,]    1    1

 [9,]    3    3
[10,]    2    2

So you shall turn your factors to character values.

But without more info from your side it is just a speculation.

Regards
Petr

> 
> Please suggest me how to get the string names back like the first table 
in
> the out put, using cbind.
> 
> Thanks in advance
> regards
> kaarz
> 
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