search for: dlvanbrunt

Displaying 20 results from an estimated 23 matches for "dlvanbrunt".

2005 Oct 27
1
Repost: Examples of "classwt", "strata", and "sampsize" in randomForest?
...Similar for "strata" and "sampsize" though there is a default for sampsize that makes sense... not sure how you would make "a vector of the length the number of strata", however.... Pointers? -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 Oct 27
1
Repost: Examples of "classwt", "strata", and "sampsize" i n randomForest?
...guess > I've made has generated an error.... > > > On 10/27/05, Gabor Grothendieck <ggrothendieck at gmail.com> wrote: > > > > See > > http://finzi.psych.upenn.edu/R/Rhelp02a/archive/40898.html > > > > On 10/27/05, David L. Van Brunt, Ph.D. <dlvanbrunt at gmail.com> wrote: > > > Sorry for the repost, but I've really been looking, and > can't find any > > > syntax direction on this issue... > > > > > > Just browsing the documentation, and searching the list > came up short... > > I >...
2005 Nov 07
4
R seems to "stall" after several hours on a long series of analyses... where to start?
...X)... any other suggestions on where to look, or what to try to get more information? Sorry so vague... it's a LOT of code, runs fine without error for many iterations, so I didn't think the problem was syntax... -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 Aug 10
2
Creating new columns inside a loop
...n" but I'm not sure what to call it in R so that I can find instructions on how to create, name, and address the values stored this way... any gentle nudges in the right direction would be greatly appreciated! -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2007 Mar 15
2
replacing all NA's in a dataframe with zeros...
...ll vars) without naming each var separately. Yikes. I'm racking my brain on this, seems like I must be staring at the obvious, but it eludes me. Searches have come up CLOSE, but not quite what I need.. Any pointers? -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com "If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy." --James Madison [[alternative HTML version deleted]]
2005 Nov 07
1
R seems to "stall" after several hours on a long series o f analyses... where to start?
...ceanography > Dept Fisheries & Oceans > Dartmouth NS Canada B2Y 4A2 Tel. (902) 426-3529 Fax (902) 426-9710 Email fowlerm at mar.dfo-mpo.gc.ca Home Tel. (902) 461-0708 Home Email mark.fowler at ns.sympatico.ca -----Original Message----- From: David L. Van Brunt, Ph.D. [mailto:dlvanbrunt at gmail.com] Sent: November 7, 2005 7:16 AM To: r-help at stat.math.ethz.ch Subject: [R] R seems to "stall" after several hours on a long series of analyses... where to start? Not sure where to even start on this.... I'm hoping there's some debugging I can do... I have a loop...
2007 Mar 23
1
memory, speed, and assigning results into new v. existing variable
...that I don't have to double the memory with 2 objects, but then again.. there'd have to be a "working copy" in memory until the operation was complete, right? Just curious about the inner workings of R. -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com "If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy." --James Madison [[alternative HTML version deleted]]
2005 Nov 23
2
TryCatch() with read.csv("http://...")
...little brain can come up with... no luck. I still end up jumping out of the entire script if I hit an error page. Does anyone have some example syntax that I might examine or try out? I'm feeling pretty thick here... -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 Sep 13
1
Anyone have any code for importing data from NAMCS?
...riable names and value labels. This is a big file, so doing it from scratch will take quite a bit of time... Just hoping I can avoid re-inventing the wheel! Anyone out there interested in throwing me a rope? Thanks! -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 May 15
1
Not sure if this is "aggregate" or some other task.
...ples that were on the mark. I think I'm suffering from "prospective interference" and my SPSS syntax knowledge to do exactly this is just getting in my way. any volunteers? I'd very grateful. Thanks! -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2010 Nov 21
1
abline(h=whatever) not working in candleChart() (in quantmod)?
...constant doing that... I'm sure it should be obvious, since my searching on google hasn't turned up anything. So I'm getting ready for a "face-palm" moment if anyone can point me in the right direction! --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com On Sun, Nov 21, 2010 at 10:29 AM, David Winsemius <dwinsemius@comcast.net>wrote: > stop() throws an error but the side effect is to pop out of whatever > environment you may be in and return to the top-level. I thought that was > what you wanted. If not, then please pro...
2006 May 23
1
Survey proportions... Can I use population as denominator?
...n fruitful so far. I'm suffering from interference, I'm sure, where knowledge of another package is getting in the way of seeing what I need to do. Anyone able to nudge me in the right direction? Much obliged... -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2007 May 08
0
How might I -remove- a tree from a random forest?
...9;s a tool somewhere out there to do this in a straightforward fashion, or any breadcrumbs to get me going. If this is a "new" thing, I'll post the function when I'm done for others to play with it, too. -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com "If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy." --James Madison [[alternative HTML version deleted]]
2005 Oct 25
0
Examples of "classwt", "strata", and "sampsize" in randomForest?
...Similar for "strata" and "sampsize" though there is a default for sampsize that makes sense... not sure how you would make "a vector of the length the number of strata", however.... Pointers? -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 Oct 09
1
Insert value from same column of another row (lag across observations)
...yesterday" "2" "2" [3,] "the day before" "3" "3" [4,] "two days before" "4" "4" So the "lagging" doesn't work. Any ideas? -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2005 Apr 19
2
Compatability with Tiger OS X 10.4
Does anyone know if R will install and run properly on the soon to be released Tiger operating system (Mac OS X 10.4)? There must be several Mac users out there (like myself) who will be considering the upgrade. -- Hemant Ishwaran Staff, Dept of Quantitative Health Sciences, Cleveland Clinic Foundation Adjunct Professor, Dept of Statistics, Case University
2005 Oct 04
1
"Survey" package and NAMCS data... unsure of specification
...c) I get that the "weights" should be PATWT, and it seems that the "strata" should be CSTRATM, but I'm unsure of how to handle the primary sampling units (CPSUM). Does anyone have any suggestions? -- --------------------------------------- David L. Van Brunt, Ph.D. mailto:dlvanbrunt@gmail.com [[alternative HTML version deleted]]
2007 Jan 28
2
help with RandomForest classwt option
Hello there, I am working on an extremely unbalanced two class classification problems. I wanna use "classwt" with "down sampling" together. By checking the rfNews() in R, it looks that classwt is not working yet. Then I looked at the software from Salford. I did not find the down sampling option. I am wondering if you have any experience to deal with this problem. Do you
2009 Dec 19
1
as.xts convert all my numeric data to character
Hello, all... I've been playing with the TTR package and quantmod, and I'm loading the Chicago Board of Exchange put/call ratio data via a simple read.csv call... CBOEtotal<-read.csv(file=" http://www.cboe.com/publish/ScheduledTask/MktData/datahouse/totalpc.csv ",skip=1) this gives me a data frame with columns.... > names(CBOEtotal) [1] "Trade_date"
2005 Nov 08
4
writing R shell scripts?
I'm new to the list. I've used R and S-PLUS a bit for about 15 years but am now working to make R my main program for all numerical and statistical computing. I also use Octave for this kind of work and I recommend it (it is also under the GPL). Here's my question: In Octave I can write shell scripts in the Linux/UNIX environment that begin with a line like this...