R help - Feb 2012 - How to determine a subset of a binary strings?

Hi,

I need some neat ways of determing a subset of binary strings. For example,
x=c(0,0,1), y=c(0,1,1), z=c(0,1,0). So x is a subset of y and z is also a
subset of y, but x is not a subset of z.

I tried to search R functions and packages but no hits. Any ideas?

 

Best,

Jing

 

--

Jing Tang, PhD

Senior Researcher

Finnish Institute of Molecular Medicine (FIMM)

FI-00014 University of Helsinki

Finland

 

 


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On 20-02-2012, at 14:15, jing tang wrote:
> Hi,
> 
> I need some neat ways of determing a subset of binary strings. For example,
> x=c(0,0,1), y=c(0,1,1), z=c(0,1,0). So x is a subset of y and z is also a
> subset of y, but x is not a subset of z.
> 
> I tried to search R functions and packages but no hits. Any ideas?
x <- c(0,0,1)
y <- c(0,1,1)
z <- c(0,1,0)

any(x & y)
any(z & y)
any(x & z)

Berend

Hi Jing,

I am not sure I got your definition of a "subset" right, but maybe
this
helps.

Regards,
Enrico

x <- c(0,0,1)
y <- c(0,1,1)
z <- c(0,1,0)

## is x a 'subset' of y?
isSubset <- function(x, y) {
     x <- as.logical(x)
     y <- as.logical(y)
     all(y[x] == TRUE)
}

isSubset(x, y)
isSubset(z, y)
isSubset(x, z)

## create all subsets
exampleVec <- c(0,1,1,0,1)
fun <- function(t)
     if (t) 0:1 else 0
expand.grid(lapply(as.list(exampleVec), fun))



Am 20.02.2012 14:15, schrieb jing tang:
> Hi,
>
> I need some neat ways of determing a subset of binary strings. For example,
> x=c(0,0,1), y=c(0,1,1), z=c(0,1,0). So x is a subset of y and z is also a
> subset of y, but x is not a subset of z.
>
> I tried to search R functions and packages but no hits. Any ideas?
>
>
>
> Best,
>
> Jing
>
>
>
> --
>
> Jing Tang, PhD
>
> Senior Researcher
>
> Finnish Institute of Molecular Medicine (FIMM)
>
> FI-00014 University of Helsinki
>
> Finland
>
>
>
>
>
>
> 	[[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.
>
-- 
Enrico Schumann
Lucerne, Switzerland
http://nmof.net/

On Mon, Feb 20, 2012 at 03:15:53PM +0200, jing tang
wrote:
> Hi,
> 
> I need some neat ways of determing a subset of binary strings. For example,
> x=c(0,0,1), y=c(0,1,1), z=c(0,1,0). So x is a subset of y and z is also a
> subset of y, but x is not a subset of z.
> 
> I tried to search R functions and packages but no hits. Any ideas?
Hi.

Try this

  all(x <= y) # [1] TRUE
  all(z <= y) # [1] TRUE
  all(x <= z) # [1] FALSE

Hope this helps.

Petr Savicky.