search for: ramsay

Hi: I need to apply the IRT model from Ramsay (1991), He apply the Smoothing Kernel to multiple choice test. Is possible in R?. Thank you, Xavier G. Ordonez Doctoral Student Universidad Complutense de Madrid

Hi, is there support (i.e. packages or similar) in R for functional data analysis as suggested by Ramsay (1982) and Besse and Ramsay (1986)? Cheers Roland -- E-Mail : Roland.Goecke at ieee.org -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[u...

Hi all, I'm having major issues with smoothing my functional data I'm referring to Jim Ramsay's examples in his books. The following error message keeps appearing, despite all my data being numeric.... can anyone kindly offer any suggestions? isi - vector of argument values - i.e. the independent variable of the curves rlz - data array TMSfdPar - functional data parameter. > TMSfdP...

The fda package supports "Functional Data Analysis" and "Applied Functional Data Analysis" by Bernard Silverman and James Ramsay. Functional data analysis, which lots of us like to call "FDA", is about the analysis of information on curves or functions. FDA is a collection statistical techniques for answering questions like, "What are the main ways in which the curves vary from one to another?" In fact, m...

The fda package supports "Functional Data Analysis" and "Applied Functional Data Analysis" by Bernard Silverman and James Ramsay. Functional data analysis, which lots of us like to call "FDA", is about the analysis of information on curves or functions. FDA is a collection statistical techniques for answering questions like, "What are the main ways in which the curves vary from one to another?" In fact, m...

...least one example AND deleting svd2 doesn't break anything in revdepcheck, then delete it. 4. If you still need to retain svd2 because of a revdepcheck problem, I'd also document that in "cran-comments.md". What do you think? spencer On 2020-11-10 07:10, James Ramsay wrote: > Hi Spencer, > > One thing I?d like check with you: > > I removed svd2 because CRAN indicated that LINPACK had been deprecated. I replaced calls to svd2 with svd in geigen and CSTRfn. > > This could be the issue with the two broken codes ? or not. But what is your...

fda 1.2.3 ======================== Version 1.2.3 of the fda package has just been released. This version adds to previous versions a script to create most of the figures of chapter 6 of "Applied Functional Data Analysis" by Ramsay and Silverman. Other changes offer simpler calls to time warping / registration and functional principal component functions. The fda package supports the books "Functional Data Analysis" and "Applied Functional Data Analysis" by Bernard Silverman and James Ramsay. Functional d...

Hi Guys, I had a monthly time series's data of land temperature from 1980 to 2008. After plotting a scatter diagram, it seems that annually, there is a semi sinusoidal cycle. How do I run Fourier's series to the data so that I can fit model on it? I am really sorry for my question sound stupid, but I just don't know where to start. I am desperately looking for help from you guys.

Hi, All: What might cause "R CMD check" to report, "could not find function" for a function that has long been in the 'fda' package? Both Jim Ramsay in Ottawa, Canada, and I in San Jose, CA, get this same error. I replicated it with a fresh, anonymous checkout from R-Forge (svn checkout svn://svn.r-forge.r-project.org/svnroot/fda). With this, I did "R CMD build pkg", then "R CMD check fda_2.1.0.tar.gz", with the follow...

...but not > what those packages have assumed... > > @Spencer: Are you actively using 'giveCsparse = ..' somewhere > in your code? > If not, why would you be interested in the details of the changes > (which would be entirely invisible to you as user) ? ????? Jim Ramsay is rewriting the code for fda::fRegress.? It requires a double iteration, which is already fairly expensive and often involves large matrices, especially if you want to estimate, e.g., more spline coefficients than observations by using some smoothness criterion to make the problem estimable.?...

I like what smooth.spline does but I am unclear on the output. I can see from the documentation that there are fit.coef but I am unclear what those coeficients are applied to.With spline I understand the "noraml" coefficients applied to a cubic polynomial. But these coefficients I am not sure how to interpret. If I had a description of the algorithm maybe I could figure it out but as it

Hi Can any one inform me an r package used to fit Cubic M-splines or r functions used to have design and penalty matrices in fitting cubic  M-splines please? Thanks, Tigist [[alternative HTML version deleted]]

I running the codeweavers wine build on my Mandrake 7.2 Linux Box. I want to start Caesar 3. It runs good, but i can't click a button to start the game :((( Have anyone an idea?? Thanks, Roman

...55 10.8.50.75 vrm378-02<00> The problem is that I'm using iptables to do static nat that eats all the packets bound for every IP on br0 except for the "primary" one of 10.8.50.71 - How do I tell nmbd to return that one instead of the latest-added address of 10.8.50.75? -- Jim Ramsay -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: not available Url : http://lists.samba.org/archive/samba/attachments/20080306/ce5a5797/signature.bin

Hello, I've noticed that SPLUS has a function for evaluating the derivative matrices of splines. I've also noticed that there's a function in R for evaluating matrices from smooth.spline; maybe someone knows if something has been written to evaluate matrices from 'smooth.basis'? regards, s

...n 50 finite values **and there are no ties**. Otherwise, a normal approximation is used. However, this does not appear to be the case in R 2.4.1 or R 2.5.0. In fact, even example(ansari.test) produces a warning Warning message: cannot compute exact p-value with ties in: ansari.test.default(ramsay, jung.parekh) although the "exact" parameter is omitted. Patch: Index: src/library/stats/R/ansari.test.R =================================================================== --- src/library/stats/R/ansari.test.R (revision 40902) +++ src/library/stats/R/ansari.test.R (working copy)...

...s', package='fda'). A package using the returnMatrix argument will also need Matrix in the dependencies in DESCRIPTION and something like import(Matrix) in NAMESPACE. Each use will require adding returnMatrix = TRUE to an appropriate fda function call. Best Wishes, Jim Ramsay, Giles Hooker, Spencer Graves _______________________________________________ R-packages mailing list R-packages at r-project.org https://stat.ethz.ch/mailman/listinfo/r-packages

Hello, I am using library fda and I can not run a lot of functions because I receive the error: Error in bsplineS(evalarg, breaks, norder, nderiv) : couldn't find function "spline.des" do you know how I can fix that? Thnaks. Liliana

Hello, I'm currently trying to find a method to interpolate or smooth data that represent a trajectory in space. For example, I have an ordered (=time) set of (x,y) tuples which constitute a path in a 2D space. Is there a way using R to interpolate between these points in a way similar to spline interpolation so that I get a smooth path in space? Greetings, Dieter -- Dieter Vanderelst

...ifferent answers, it is very hard to establish the true answer. I am fairly convinced that both S-PLUS versions are slightly wrong.) I plan to add S-estimation, a general M-estimator (based on my function rlm) and MM-estimation to this over the next few weeks. While I am posting, a R port of Jim Ramsay's psplines package is also there en route to CRAN, file (pspline_1.0-1.tar.gz) as well as an update of the V&R `R' Complements to 0.62.3. -- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxfor...