Yes, it is. I'm looking into understanding this now...
thanks!
Ben
On Mon, May 14, 2012 at 12:38 PM, William Dunlap <wdun...@tibco.com> wrote:
> To the list of function I sent, add another that converts a list of
> intervals
> into a Ranges object:
> as.Ranges.list <- function (x, ...) {
> stopifnot(nargs() == 1, all(vapply(x, length, 0) == 2))
> # use c() instead of unlist() because c() doesn't mangle POSIXct and
> Date objects
> x <- unname(do.call(c, x))
> odd <- seq(from = 1, to = length(x), by = 2)
> as.Ranges(bottoms = x[odd], tops = x[odd + 1])
> }
> Then stop using get() and assign() all over the place and instead make
> lists of
> related intervals and convert them to Ranges objects:
> > x <- as.Ranges(list(x_rng))
> > s <- as.Ranges(list(s1_rng, s2_rng, s3_rng, s4_rng, s5_rng))
> > x
> bottoms tops
> 1 -100 100
> > s
> bottoms tops
> 1 -250.50 30.0
> 2 0.77 10.0
> 3 25.00 35.0
> 4 70.00 80.3
> 5 90.00 95.0
> and then compute the difference between the sets x and s (i.e., describe
> the points in x but not s as a union of intervals):
> > setdiffRanges(x, s)
> bottoms tops
> 1 35.0 70
> 2 80.3 90
> 3 95.0 100
> and for a graphical check do
> > plot(x, s, setdiffRanges(x, s))
> Are those the numbers you want?
>
> I find it easier to use standard functions and data structures for this
> than
> to adapt the cumsum/order idiom to different situations.
>
> Bill Dunlap
> Spotfire, TIBCO Software
> wdunlap tibco.com
>
>
> > -----Original Message-----
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf
> > Of Ben quant
> > Sent: Monday, May 14, 2012 11:07 AM
> > To: jim holtman
> > Cc: r-help@r-project.org
> > Subject: Re: [R] range segment exclusion using range endpoints
> >
> > Turns out this solution doesn't work if the s range is outside the range
> of
> > the x range. I didn't include that in my examples, but it is something I
> > have to deal with quite often.
> >
> > For example s1_rng below causes an issue:
> >
> > x_rng = c(-100,100)
> > s1_rng = c(-250.5,30)
> > s2_rng = c(0.77,10)
> > s3_rng = c(25,35)
> > s4_rng = c(70,80.3)
> > s5_rng = c(90,95)
> >
> > sNames <- grep("s[0-9]+_rng", ls(), value = TRUE)
> > queue <- rbind(c(x_rng[1], 1), c(x_rng[2], 1))
> > for (i in sNames){
> > queue <- rbind(queue
> > , c(get(i)[1], 1) # enter queue
> > , c(get(i)[2], -1) # exit queue
> > )
> > }
> > queue <- queue[order(queue[, 1]), ] # sort
> > queue <- cbind(queue, cumsum(queue[, 2])) # of people in the queue
> > for (i in which(queue[, 3] == 1)){
> > cat("start:", queue[i, 1L], ' end:', queue[i + 1L, 1L], "\n")
> > }
> >
> > Regards,
> >
> > ben
> > On Sat, May 12, 2012 at 12:50 PM, jim holtman <jholt...@gmail.com>
> wrote:
> >
> > > Here is an example of how you might do it. It uses a technique of
> > > counting how many items are in a queue based on their arrival times;
> > > it can be used to also find areas of overlap.
> > >
> > > Note that it would be best to use a list for the 's' end points
> > >
> > > ================================
> > > > # note the next statement removes names of the format 's[0-9]+_rng'
> > > > # it would be best to create a list with the 's' endpoints, but this
> is
> > > > # what the OP specified
> > > >
> > > > rm(list = grep('s[0-9]+_rng', ls(), value = TRUE)) # Danger Will
> > > Robinson!!
> > > >
> > > > # ex 1
> > > > x_rng = c(-100,100)
> > > >
> > > > s1_rng = c(-25.5,30)
> > > > s2_rng = c(0.77,10)
> > > > s3_rng = c(25,35)
> > > > s4_rng = c(70,80.3)
> > > > s5_rng = c(90,95)
> > > >
> > > > # ex 2
> > > > # x_rng = c(-50.5,100)
> > > >
> > > > # s1_rng = c(-75.3,30)
> > > >
> > > > # ex 3
> > > > # x_rng = c(-75.3,30)
> > > >
> > > > # s1_rng = c(-50.5,100)
> > > >
> > > > # ex 4
> > > > # x_rng = c(-100,100)
> > > >
> > > > # s1_rng = c(-105,105)
> > > >
> > > > # find all the names -- USE A LIST NEXT TIME
> > > > sNames <- grep("s[0-9]+_rng", ls(), value = TRUE)
> > > >
> > > > # initial matrix with the 'x' endpoints
> > > > queue <- rbind(c(x_rng[1], 1), c(x_rng[2], 1))
> > > >
> > > > # add the 's' end points to the list
> > > > # this will be used to determine how many things are in a queue (or
> > > areas that
> > > > # overlap)
> > > > for (i in sNames){
> > > + queue <- rbind(queue
> > > + , c(get(i)[1], 1) # enter queue
> > > + , c(get(i)[2], -1) # exit queue
> > > + )
> > > + }
> > > > queue <- queue[order(queue[, 1]), ] # sort
> > > > queue <- cbind(queue, cumsum(queue[, 2])) # of people in the queue
> > > > print(queue)
> > > [,1] [,2] [,3]
> > > [1,] -100.00 1 1
> > > [2,] -25.50 1 2
> > > [3,] 0.77 1 3
> > > [4,] 10.00 -1 2
> > > [5,] 25.00 1 3
> > > [6,] 30.00 -1 2
> > > [7,] 35.00 -1 1
> > > [8,] 70.00 1 2
> > > [9,] 80.30 -1 1
> > > [10,] 90.00 1 2
> > > [11,] 95.00 -1 1
> > > [12,] 100.00 1 2
> > > >
> > > > # print out values where the last column is 1
> > > > for (i in which(queue[, 3] == 1)){
> > > + cat("start:", queue[i, 1L], ' end:', queue[i + 1L, 1L], "\n")
> > > + }
> > > start: -100 end: -25.5
> > > start: 35 end: 70
> > > start: 80.3 end: 90
> > > start: 95 end: 100
> > > >
> > > >
> > > =========================================
> > >
> > > On Sat, May 12, 2012 at 1:54 PM, Ben quant <ccqu...@gmail.com> wrote:
> > > > Hello,
> > > >
> > > > I'm posting this again (with some small edits). I didn't get any
> replies
> > > > last time...hoping for some this time. :)
> > > >
> > > > Currently I'm only coming up with brute force solutions to this issue
> > > > (loops). I'm wondering if anyone has a better way to do this. Thank
> you
> > > for
> > > > your help in advance!
> > > >
> > > > The problem: I have endpoints of one x range (x_rng) and an unknown
> > > number
> > > > of s ranges (s[#]_rng) also defined by the range endpoints. I'd like
> to
> > > > remove the x ranges that overlap with the s ranges. The examples
> below
> > > > demonstrate what I mean.
> > > >
> > > > What is the best way to do this?
> > > >
> > > > Ex 1.
> > > > For:
> > > > x_rng = c(-100,100)
> > > >
> > > > s1_rng = c(-25.5,30)
> > > > s2_rng = c(0.77,10)
> > > > s3_rng = c(25,35)
> > > > s4_rng = c(70,80.3)
> > > > s5_rng = c(90,95)
> > > >
> > > > I would get:
> > > > -100,-25.5
> > > > 35,70
> > > > 80.3,90
> > > > 95,100
> > > >
> > > > Ex 2.
> > > > For:
> > > > x_rng = c(-50.5,100)
> > > >
> > > > s1_rng = c(-75.3,30)
> > > >
> > > > I would get:
> > > > 30,100
> > > >
> > > > Ex 3.
> > > > For:
> > > > x_rng = c(-75.3,30)
> > > >
> > > > s1_rng = c(-50.5,100)
> > > >
> > > > I would get:
> > > > -75.3,-50.5
> > > >
> > > > Ex 4.
> > > > For:
> > > > x_rng = c(-100,100)
> > > >
> > > > s1_rng = c(-105,105)
> > > >
> > > > I would get something like:
> > > > NA,NA
> > > > or...
> > > > NA
> > > >
> > > > Ex 5.
> > > > For:
> > > > x_rng = c(-100,100)
> > > >
> > > > s1_rng = c(-100,100)
> > > >
> > > > I would get something like:
> > > > -100,-100
> > > > 100,100
> > > > or just...
> > > > -100
> > > > 100
> > > >
> > > > PS - You may have noticed that in all of the examples I am including
> the
> > > s
> > > > range endpoints in the desired results, which I can deal with later
> in my
> > > > program so its not a problem... I think leaving in the s range
> endpoints
> > > > simplifies the problem.
> > > >
> > > > Thanks!
> > > > Ben
> > > >
> > > > [[alternative HTML version deleted]]
> > > >
> > > > ______________________________________________
> > > > 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.
> > >
> > >
> > >
> > > --
> > > Jim Holtman
> > > Data Munger Guru
> > >
> > > What is the problem that you are trying to solve?
> > > Tell me what you want to do, not how you want to do it.
> > >
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
>
[[alternative HTML version deleted]]
______________________________________________
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.
