[R] Fastest way of finding if any members of vector x fall in the range of the rows of matrix y

[Dennis Murphy]

Hi:

That leaves open several possibilities. Could you please supply a
small, reproducible example (i.e., one that someone can copy and paste
into an R session) that illustrates the problem along with the
solution you expect?

TIA,
Dennis

On Fri, Jun 24, 2011 at 2:30 AM, Salih Tuna <salihtuna at gmail.com> wrote:
> Hi Dimitris,
> Thanks for your reply. But this is not exactly what i am after. I want to
> find the probes that falls into certain regions. In your solution it will
> ignore the second probe if it falls into the same region as the first one.
> Is there any vector trickb uilt in R to find whether probes fall into
> certain regions?
> best,
> salih
>
> On Fri, Jun 24, 2011 at 10:23 AM, Dimitris Rizopoulos <
> d.rizopoulos at erasmusmc.nl> wrote:
>
>> One approach is the following:
>>
>> x <- rnorm(5)
>> y <- matrix(rnorm(5*2), 5, 2)
>>
>> check <- y - x
>> check[, 1] * check[, 2] < 0
>>
>>
>> I hope it helps.
>>
>> Best,
>> Dimitris
>>
>>
>>
>> On 6/24/2011 10:57 AM, Salih Tuna wrote:
>>
>>>  Hi All,
>>> What is the fastest way of finding if any members of vector x fall in the
>>> range of the rows of matrix y?
>>> I do not want to use two for loops as this will take forever.
>>> Any help will be appreciated,
>>> best,
>>> salih
>>>
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>>>
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>> --
>> Dimitris Rizopoulos
>> Assistant Professor
>> Department of Biostatistics
>> Erasmus University Medical Center
>>
>> Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
>> Tel: +31/(0)10/7043478
>> Fax: +31/(0)10/7043014
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>>
>
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