I am new to more radical programming in R. I am trying to write a nested
'for' loop to produce output that takes subscripts like:
for i taking values 1,2,3,4,5 and
j taking values 1,2,3
I want to output for a computation using the combination values of i and j a
value x like this;
i j x
1 1 x11
1 2 x12
1 3 x13
2 1 x21
2 2 x22
2 3 x23
3 1 x31
3 2 x32
3 3 x33
........
.......
Need help urgently.
Thanks.
Philip
A Smile costs Nothing
But Rewards Everything
Happiness is not perfected until it is shared
-Jane Porter
[[alternative HTML version deleted]]
Try:
paste("x", as.vector(t(outer(1:4, 1:3, FUN=paste,
sep=""))), sep="")
or
paste("x", apply(expand.grid(1:4, 1:3), 1, paste,
collapse=""), sep="")
On Mon, May 19, 2008 at 4:40 PM, Philip Twumasi-Ankrah <
nana_kwadwo_derkyi@yahoo.com> wrote:
> I am new to more radical programming in R. I am trying to write a nested
> 'for' loop to produce output that takes subscripts like:
>
> for i taking values 1,2,3,4,5 and
> j taking values 1,2,3
>
> I want to output for a computation using the combination values of i and j
> a value x like this;
>
> i j x
> 1 1 x11
> 1 2 x12
> 1 3 x13
> 2 1 x21
> 2 2 x22
> 2 3 x23
> 3 1 x31
> 3 2 x32
> 3 3 x33
> ........
> .......
>
> Need help urgently.
>
> Thanks.
>
> Philip
>
>
> A Smile costs Nothing
>
> But Rewards Everything
>
> Happiness is not perfected until it is shared
> -Jane Porter
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@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.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
[[alternative HTML version deleted]]
Hey Philip,
I'm not sure if I understand what your "x11", "x12",
etc. are. You can
combine the values of your two vectors using the expand.grid function.
There is no need to do nester FOR loops:
> i=c(1,2,3,4,5)
> j=c(1,2,3)
> x=expand.grid(i,j)
> print (x)
Var1 Var2
1 1 1
2 2 1
3 3 1
4 4 1
5 5 1
6 1 2
7 2 2
8 3 2
9 4 2
10 5 2
11 1 3
12 2 3
13 3 3
14 4 3
15 5 3
Hope this helps,
Julian
Philip Twumasi-Ankrah wrote:> I am new to more radical programming in R. I am trying to write a nested
'for' loop to produce output that takes subscripts like:
>
> for i taking values 1,2,3,4,5 and
> j taking values 1,2,3
>
> I want to output for a computation using the combination values of i and j
a value x like this;
>
> i j x
> 1 1 x11
> 1 2 x12
> 1 3 x13
> 2 1 x21
> 2 2 x22
> 2 3 x23
> 3 1 x31
> 3 2 x32
> 3 3 x33
> ........
> .......
>
> Need help urgently.
>
> Thanks.
>
> Philip
>
>
> A Smile costs Nothing
>
> But Rewards Everything
>
> Happiness is not perfected until it is shared
> -Jane Porter
>
>
>
> [[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.