Hi
Keep your replies on the list, you can get more and better replies.
Do not post in HTML
combination of values is easily achieved e.g. by expand grid
expand.grid(mat[,1], mat[,2])
Regards
Petr
From: ameneh deljoo [mailto:amene.deljoo at gmail.com]
Sent: Tuesday, May 31, 2016 3:45 PM
To: PIKAL Petr <petr.pikal at precheza.cz>
Subject: Re: [R] Pairwise table from cloumns
thanks for your reply.
I wanna a matrix with all possible combination of data. For example, a
combination of column 1 and 2.
{(1,2)(1,3)(1,4)(2,1)(2,3)(2,4)...}
On Tue, May 31, 2016 at 3:19 PM, PIKAL Petr <petr.pikal at
precheza.cz<mailto:petr.pikal at precheza.cz>> wrote:
Hi
your message is rather scrambled and to be honest not well understandable (by
me).
having two column matrix
> mat<-matrix(1:8, 4,2)
> mat
[,1] [,2]
[1,] 1 5
[2,] 2 6
[3,] 3 7
[4,] 4 8
You can calculate eg. distance
> dist(mat, diag=T, upper=T)
1 2 3 4
1 0.000000 1.414214 2.828427 4.242641
2 1.414214 0.000000 1.414214 2.828427
3 2.828427 1.414214 0.000000 1.414214
4 4.242641 2.828427 1.414214 0.000000
But from your description I do not understand how you want to reshape your data.
Example, please.
Regards
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at
r-project.org<mailto:r-help-bounces at r-project.org>] On Behalf Of ameneh
> deljoo
> Sent: Tuesday, May 31, 2016 12:13 PM
> To: r-help at r-project.org<mailto:r-help at r-project.org>
> Subject: [R] Pairwise table from cloumns
>
> *Hi Group
> **I have a large data set of individual pairwise values (100 rows) **that
I**
> need to reshape into a pairwise matrix for mantel tests of similarity these
> values** .
> **I need this matrix for a Pathfinder network analysis. *
>
> *I have a different data(word) such as :*
>
>
>
>
>
> living thing
> 0
>
>
> animal
> 1
>
>
> blood
> 2
>
>
> bird
> 3
>
>
> feathers
> 4
>
>
> robin
> 5
>
>
> chicken
> ....
> 6
>
>
>
> *I need the final matrix to be formatted as based on the similarity
> ** A1 A2 A3 A4
> ** A1 0 32 40 32
> * *A2 32 0 49 38
> ** A3 40 49 0 53
> ** A4 32 38 53 0*
>
> *....*
>
>
> Are there any functions/packages that will make this easier? Thanks Ameneh
>
> [[alternative HTML version deleted]]
>
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