[R] Find all numbers in a certain interval

[Antje]

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
>>
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>