search for: monotone

Displaying 20 results from an estimated 578 matches for "monotone".

2004 Jul 12
3
Smooth monotone estimation on R
Hi all, I'm looking for smooth monotone estimation packages, preferably using splines. I downloaded the 'cobs' package and intend to use it, but since it offers only quadratic splines based on L1 minimization, I'd like to compare its performance to that of a more 'mainstream' cubic-spline, L2-norm minimizing spline....
2014 Mar 07
3
[LLVMdev] [RFC] Add second "failure" AtomicOrdering to cmpxchg instruction
Hi all, The C++11 (& C11) compare_exchange functions with explicit memory order allow you to specify two sets of semantics, one for when the exchange actually happens and one for when it fails. Unfortunately, at the moment the LLVM IR "cmpxchg" instruction only has one ordering, which means we get sub-optimal codegen. This probably affects all architectures which use
2011 Aug 22
2
[LLVMdev] Reviving the new LLVM concurrency model
On Mon, Aug 22, 2011 at 9:55 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: > In the definition of 'monotonic' ordering, > ... "If an address is written monotonically by one thread, and other > threads monotonically read that address repeatedly, the other threads > must eventually see the write"... It's supposed to mean that if you have a something
2011 Aug 22
4
[LLVMdev] Reviving the new LLVM concurrency model
On Mon, Aug 22, 2011 at 11:17 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: > On Mon, Aug 22, 2011 at 1:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: >> On Mon, Aug 22, 2011 at 9:55 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >>> In the definition of 'monotonic' ordering, >>> ... "If an address is written
2011 Aug 22
0
[LLVMdev] Reviving the new LLVM concurrency model
In the definition of 'monotonic' ordering, ... "If an address is written monotonically by one thread, and other threads monotonically read that address repeatedly, the other threads must eventually see the write"... Does this mean if a thread does multi-writes monotonically, monotonic reads from other threads should see all of them? But intuitively, it seems to be fine for a
2012 Jul 13
2
[LLVMdev] LLVM IR atomics: difference between unordered and monotonic?
Hi All, I am reading about LLVM IR atomics (http://llvm.org/docs/Atomics.html) and get confused about the difference between "Unordered" and "Monotonic". In particular, I am not sure I understand the statement of "It essentially guarantees that if you take all the operations affecting a specific address, a consistent ordering exists.". For me, it means that for the
2011 Aug 22
0
[LLVMdev] Reviving the new LLVM concurrency model
On Mon, Aug 22, 2011 at 1:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Mon, Aug 22, 2011 at 9:55 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >> In the definition of 'monotonic' ordering, >> ... "If an address is written monotonically by one thread, and other >> threads monotonically read that address repeatedly, the other
2005 May 08
4
Monotonic regression
Hi, I'm trying to find an implementation of monotonic regression in R and I haven't been able to find anything that's really related to this. isoMDS in the MASS package uses monotonic regression, however, I was wondering if there is any standalone function for monotonic regression? Basically what I'm trying to do is implement monotonic regression where I can see not just the
2005 Jan 06
2
patterns of missing data: determining monotonicity
Here is a problem that perhaps someone out here has an idea about. It vaguely reminds me of something I've seen before, but can't place. Can anyone help? For multiple imputation, there are simpler methods available if the patterns of missing data are 'monotone' --- if Vj is missing then all variables Vk, k>j are also missing, vs. more complex methods required when the patterns are not monotone. The problem is to determine if, for a collection of variables, there is an ordering of them with a monotone missing data pattern, or, if not, what the...
2011 Aug 22
0
[LLVMdev] Reviving the new LLVM concurrency model
On Mon, Aug 22, 2011 at 3:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Mon, Aug 22, 2011 at 11:17 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >> On Mon, Aug 22, 2011 at 1:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: >>> On Mon, Aug 22, 2011 at 9:55 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >>>> In
2009 Apr 17
1
Monotone Transformation
Hi, I am trying to use R to mimic what I did in SAS. proc transreg data=x ; model identity(GSI)=monotone(group1); output out=d2 pprefix=M; run; Accroding to SAS documentation, the MONOTONE transfomation algorithm comes from (Kruskal 1964, secondary approach to ties). I have tried ace. it does provide some kind of monotone transformation, but it is not what I expected. Here is how sas o...
2010 Feb 15
1
Non-monotonic spline using splinefun(method = "monoH.FC")
Hi, In my version of R, the stats package splinefun code for fitting a Fritsch and Carlson monotonic spline does not appear to guarantee a monotonic result. If two adjoining sections both have over/undershoot the way the resulting adjustment of alpha and beta is performed can give modified values which still do not satisfy the required constraints. I do not think this is due to finite precision
2004 Nov 29
2
problem with using transace
...e Hmisc function transace to transform predictors > > test<-cbind(flowstress,pressres,alloy) > xtrans<-transace(x,binary=pressres',monotonic='flowstress', categorical='alloy') > > >and I am getting the following message?? >Error in ace(x[, -i], x[, i], monotone = im, categorical = ic) : > unused argument(s) (monotone ...) > >Any idea? thanks anne >thank for your help >Anne > >
2011 Aug 22
0
[LLVMdev] Reviving the new LLVM concurrency model
On Mon, Aug 22, 2011 at 3:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Mon, Aug 22, 2011 at 11:17 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >> On Mon, Aug 22, 2011 at 1:02 PM, Eli Friedman <eli.friedman at gmail.com> wrote: >>> On Mon, Aug 22, 2011 at 9:55 AM, Jianzhou Zhao <jianzhou at seas.upenn.edu> wrote: >>>> In
2009 Aug 24
0
Monotone Smoothing specifically I splines
Hello I am looking for a function to create an Integrated (I) spline basis, somehting similar to the likes of 'bs' and 'ns'. I have come across the funcitons, fda::eval.monfd Values of a Monotone Functional Data Object fda::/.fd FDA internal functions fda::monfn Evaluates a monotone function fda::smooth.monotone Monotone Smoothing of Data mgcv::mono.con Monotonicity constraints for a cubic regression spline splines::...
2016 Apr 18
3
Memory scope proposal
> On Apr 18, 2016, at 9:12 AM, Tom Stellard via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Here is the initial proposal with some formatting fixed: > > Currently, the LLVM IR uses a binary value (SingleThread/CrossThread) to > represent synchronization scope on atomic instructions. We would like to > enhance the representation of memory scopes in LLVM IR to allow
2001 Mar 12
2
Regressions with monotonicity constraints
This seems to be a recurrent topic, but I don't remember hearing a definitive answer. I also apologies for cross-posting. Say I have a numerical response variable and a bunch of multi-level factors I want to use for modeling. I don't expect factor interaction to be important so there will be no interactions in the model. All this would be a perfect job for ANOVA except for one additional
2008 Jun 02
0
Missing "spline_coef" DLL and Rob Hyndmans monotonic interpolator
Hello R help I have been trying to use Rob Hyndman's monotonically increasing spline function. But like another user or two seem have a problem with a missing DLL (namely "spline_coef"). None of the previous help postings seemed to have any solutions to this problem. As per a Ripley suggestion I have deleted all previous versions of R and reinstalled R 2.7.0 and the problem
2002 Sep 09
1
Monotonic interpolation
Has anyone got a function for smooth monotonic interpolation of a univariate function? I'm after something like the NAG function PCHIM which does monotonic Hermite interpolation. Alternatively, montononic cubic spline interpolation. Please reply directly. Rob Hyndman ___________________________________________________ Rob J Hyndman Associate Professor & Director of Consulting
2002 Mar 05
1
Monotonicity correlation coefficients
Could anyone help me to find the mathematical expression to calculate the monotonicity correlation coefficient between two variables? Thanks in advance. Luis Rivera. Universidad de Alcal?. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or