Find all numbers in a certain interval

Hi,

sorry, but it shouldn't be "different". The result should be the same but I was 
looking if there is a method I can use...

# having a function defined like baptiste proposed:
isIn <-
function (interval, x)
{
     (x > min(interval)) & (x < max(interval))
}
  

#----------------------


a <- rnorm(100)

# it's simply more human readable if I can write

which( isIn( c(-0.5, 0.5), a) )

# instead of

which( a > -0.5 & a < 0.5 )

Thanks to baptiste! So there is no method available doing this and I have to 
define this by myself. That's all I wanted to know :-)

Antje


markleeds at verizon.net schrieb:
  

hi:  could you explain EXACTLY what you want to do with the dataframe 
because it shouldn't be that different ?



On Tue, Dec 16, 2008 at  5:09 AM, Antje wrote:

    

Hi all,

I'd like to know, if I can solve this with a shorter command:

a <- rnorm(100)
which(a > -0.5 & a < 0.5)

# would give me all indices of numbers greater than -0.5 and smaller 
than +0.5

I have something similar with a dataframe and it produces sometimes 
quite long commands...
I'd like to have something like:

which(within.interval(a, -0.5, 0.5))

Is there anything I could use for this purpose?


Antje