Re: [R] find value between two other numbers?

2010-08-13 Thread baptiste auguie
Hi,

I see no need to construct the vector, try this instead,

belong = function(x=4, y=c(1,10))  x = y[2]  x = y[1]

see also ?findInterval

HTH,

baptiste

On 13 August 2010 01:10, fishkbob fishk...@gmail.com wrote:

 So basically I want to do this -

 4 %in% 1:10
 should return true

 Would there be another way of doing this without having to do the 1:10 part?

 I am using a very large data set and trying to do

 459124 %in% 103000:983000

 multiple times for many values, and it is taking quite a long time

 Also, I would like to vary the x:y part, so I can't even make an object that
 is c(x:y) and do a which(#=c(x:y)) because I would need to change x and y
 each time.
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Re: [R] find value between two other numbers?

2010-08-13 Thread fishkbob

Awesome, that works great, and it cuts my runtime down by a lot.

thanks baptiste

I totally forgot that I could just check to see if the number was inbetween
via less than and greater than rather than having to construct the vector.

findInterval also helps with another problem I was having somewhere else...
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Re: [R] find value between two other numbers?

2010-08-12 Thread Jorge Ivan Velez
Hi,

Here is one way:

 is.there - function(mynumber, a, b)  mynumber %in% a:b
 is.there(4, 1, 10)
[1] TRUE
 is.there(459124, 103000, 983000)
[1] TRUE
 is.there(4, 103000, 983000)
[1] FALSE

HTH,
Jorge


On Thu, Aug 12, 2010 at 7:10 PM, fishkbob  wrote:


 So basically I want to do this -

 4 %in% 1:10
 should return true

 Would there be another way of doing this without having to do the 1:10
 part?

 I am using a very large data set and trying to do

 459124 %in% 103000:983000

 multiple times for many values, and it is taking quite a long time

 Also, I would like to vary the x:y part, so I can't even make an object
 that
 is c(x:y) and do a which(#=c(x:y)) because I would need to change x and y
 each time.
 --
 View this message in context:
 http://r.789695.n4.nabble.com/find-value-between-two-other-numbers-tp2323513p2323513.html
 Sent from the R help mailing list archive at Nabble.com.

 __
 R-help@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.


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