search for: polytop

I am curious whether anybody has or is developing this capability within R. I have not found any software yet that has this capability and I am not sure whether it is too new a method and nobody is actually using it, or if there are other means to get the same analysis that I do not know of. Any information regarding developments or use of this method would be helpful. Melanie Edwards

...components analysis (PCA) and hierarchal cluster analysis. I have also been experimenting with glyph representation, k-means clusters, and similar procedures as documented in MASS. More recently I have been experimenting with Independent Components Analysis (ICA). Another commonly used procedure is polytopic vector analysis (PVA), a procedure for which I have no implementation in R sand so I have not tried it out. My question is can anyone suggest : A) Other procures in R that I may have missed and should investigate B) Your experience and/or hints for using ICA and presenting the results C) An imple...

...r his PhD also implemented a similar scheme. In his use-case, optimistic run-time checks with delinearization was not possible, so this kind of intrinsic was _necessary_ for the application, not just _good to have_. More details are available in his PhD thesis: [Lattice QCD Optimization and Polytopic Representations of Distributed Memory](https://tel.archives-ouvertes.fr/tel-01078440). In particular, Chapter 9 contains a detailed discussion. # Representations ## Intrinsic ### Syntax ``` <result> = llvm.multidim.array.index.* <ty> <ty>* <ptrval> {<stride>, &l...

Dear useRs, I'd like to announce a new package called geozoo, short for geometric zoo. It's a compilation of functions to produce high-dimensional geometric objects, including hypercubes and hyperspheres, Boy's surface, the hyper torus and a selection of polytopes. For a complete list, as well as images and movies, visit http://streaming.stat.iastate.edu/~dicook/geometric-data/<http://streaming.stat.iastate.edu/%7Edicook/geometric-data/> . This package makes extensive use of GGobi (http://ggobi.org) and the rggobi package (http://ggobi.org/rggobi)...

...d a similar scheme. In his use-case, optimistic run-time checks >> with delinearization was not possible, so this kind of intrinsic was _necessary_ >> for the application, not just _good to have_. More details are available >> in his PhD thesis: [Lattice QCD Optimization and Polytopic Representations of Distributed Memory](https://tel.archives-ouvertes.fr/tel-01078440). >> In particular, Chapter 9 contains a detailed discussion. >> >> # Representations >> >> ## Intrinsic >> >> ### Syntax >> ``` >> <result> = llvm.mu...

Dear R helpers I have a question regarding the constrainOptim. I'm coding the nested logit and would like to set a bound of rho to (0,1] as an extreme value distribution where rho = exp(lambda)/1+exp(lambda) I wonder if I can do that directly in optim (say rho > 0 & <= 1) or need to use constrainOptim I read the help but still don't know how to set ui and ci Thanks, June

...similar scheme. In his use-case, optimistic run-time checks > with delinearization was not possible, so this kind of intrinsic was _necessary_ > for the application, not just _good to have_. More details are available > in his PhD thesis: [Lattice QCD Optimization and Polytopic Representations of Distributed Memory](https://tel.archives-ouvertes.fr/tel-01078440). > In particular, Chapter 9 contains a detailed discussion. > > # Representations > > ## Intrinsic > > ### Syntax > ``` > <result> = llvm.multidim.arra...

...scheme. In his use-case, optimistic run-time checks >>> with delinearization was not possible, so this kind of intrinsic was _necessary_ >>> for the application, not just _good to have_. More details are available >>> in his PhD thesis: [Lattice QCD Optimization and Polytopic Representations of Distributed Memory](https://tel.archives-ouvertes.fr/tel-01078440).>> In particular, Chapter 9 contains a detailed discussion. >>> >>> # Representations >>> >>> ## Intrinsic >>> >>> ### Syntax >>> ``` >&g...

...ntors -- Student: Anders Persson <anders@cs.ucla.edu> Summary: FreeBSD userland/kernel interface cleanups Mentor: Brooks Davis <brooks@FreeBSD.org> Student: Andrew Turner <andrew@fubar.geek.nz> Summary: Integrate BSD Installer Mentor: re@, ru@, jhb@ Student: Brian Wilson <polytopes@gmail.com> Summary: UFS Journalling Mentor: scottl@ Student: Chris Jones <chris.jones@ualberta.ca> Summary: Gvinum 'move', 'rename', etc.. Mentor: le@FreeBSD.org, phk@FreeBSD.org Student: Christoph Mathys <cmathys@bluewin.ch> Summary: Rewriting CVSup in C, the C...

...st, so we can share ideas. Here some information about graphite like optimizations in LLVM. A short introduction to the current state of GCC/Graphite: ----------------------------------------------------------------------- Graphite is a project in GCC that uses a mathematical representation, the polytop model, to represent and transform loops and other control flow structures. Using an abstract representation it is possible to reason about transformations in a more general way and to use highly optimized linear programming libraries to figure out the optimal loop structures. These transformati...

...se, optimistic run-time checks > > > with delinearization was not possible, so this kind of intrinsic was _necessary_ > > > for the application, not just _good to have_. More details are available > > > in his PhD thesis: [Lattice QCD Optimization and Polytopic Representations of Distributed Memory](https://tel.archives-ouvertes.fr/tel-01078440). > > > In particular, Chapter 9 contains a detailed discussion. > > > > > > # Representations > > > > > > ## Intrinsic > > > > > >...

Hi All, I've been having a little trouble with creating a loop that will run a a series of t.tests for inspection, Below is the code i've tried, and some checks i've looked at. I've used the get(paste()) idea as i was told previously that the use of the eval should try and be avoided. I've run a single syntax to check that my systax is correct and works without any problems