HI Utpal,

Alight, I will look into it.  I was under the impression that this is what you 
wanted:

dat1<- structure(list(V1 = c(1L, 1L, 1L, 1L, 1L, 1L, 1L), V2 = c(1L,
1L, 1L, 1L, 1L, 1L, 0L), V3 = c(1L, 1L, 1L, 1L, 1L, 1L, 1L),
    V4 = c(1L, 1L, 0L, 1L, 1L, 1L, 1L), V5 = c(1L, 1L, 1L, 1L,
    1L, 0L, 1L), V6 = c(1L, 1L, 1L, 0L, 1L, 1L, 1L), V7 = c(1L,
    1L, 1L, 1L, 1L, 1L, 1L), V8 = c(1L, 1L, 1L, 0L, 1L, 0L, 1L
    ), V9 = c(1L, 0L, 1L, 1L, 1L, 1L, 1L), V10 = c(1L, 1L, 1L,
    1L, 1L, 1L, 1L), V11 = c(0L, 1L, 1L, 1L, 1L, 1L, 1L), V12 = c(1L,
    1L, 1L, 1L, 1L, 1L, 1L), V13 = c(1L, 1L, 1L, 1L, 1L, 1L,
    1L)), .Names = c("V1", "V2", "V3", "V4", "V5", "V6", "V7",
"V8", "V9", "V10", "V11", "V12", "V13"), class = "data.frame", row.names = c(NA,
-7L))
dat2<- dat1[,1:4]
 dat2[4,]<- c(3,2,3,1)
 dat2[6,]<- c(3,3,3,3)


 dat2
#  V1 V2 V3 V4
#1  1  1  1  1
#2  1  1  1  1
#3  1  1  1  0
#4  3  2  3  1
#5  1  1  1  1
#6  3  3  3  3
#7  1  0  1  1

res<-
 lapply(2:ncol(dat2),function(i) {x1<- 
combn(names(dat2),i);unlist(lapply(1:ncol(x1), function(i) {x2<- 
dat2[,x1[,i]];dim(x2[!as.logical(rowSums(x2==0)),])[1]}))})
res
#[[1]]
#[1] 6 7 6 6 5 6

#[[2]]
#[1] 6 5 6 5
#
#[[3]]
#[1] 5


A.K.




________________________________
From: Utpal Bakshi <utpalm...@gmail.com>
To: arun <smartpink...@yahoo.com> 
Sent: Saturday, March 2, 2013 2:14 PM
Subject: Re: explanation of the problem..


may be you could use the specaccum function of vegan package for permutations.. 
the function is shown in pan genome script file..




On Sun, Mar 3, 2013 at 12:39 AM, arun <smartpink...@yahoo.com> wrote:

Another problem, is that with this combinations of many columns will be 
computationally intensive. 
>
>
>
>
>
>
>________________________________
> From: Utpal Bakshi <utpalm...@gmail.com>
>To: arun <smartpink...@yahoo.com> 
>Sent: Saturday, March 2, 2013 1:54 PM
>
>Subject: Re: explanation of the problem..
> 
>
>
>Hi Arun.. yes... even if the number is greater than 1 (what ever it may be), 
>it will still count as 1.. 
>
>
>for example 
>
>
>
>
>dat1
>#  V1 V2 V3 
>#1  3  1  2  
>#2  1  16  0  #3  1  0  1  
>
>
>will considered as same as
>
>
>dat1
>#  V1 V2 V3 
>#1  1  1  1  
>#2  1  1  0  #3  1  0  1 
>
>

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