similar to: finding correlation between two matrices

Good afternoon! I would like to ask you about similarity measures and clustering in R for Binary data. Would you please kindly help me and let me know about that commands in R? Thanks in advance for your kind attentions. I look forward to hearing from you as soon as possible. Best regards, Sima

Hi everyone, Is it possible to use tapply(x,y,mean) if not all groups of x by y are of the same length (for example if you have one missing observation)? I tried tapply(x,y,mean,na.omit=T) but it doesn't work! Steffi -- --------------------------------- Stefanie von Felten Doktorandin ETH Z?rich Institut f?r Pflanzenwissenschaften ETH Zentrum, LFW A 2 Telefon: 044 632 85 97 Telefax: 044

Dear Sir/ Madam, I would like to ask you about mantel test in R. In ade4 package, if I want to use mantel.rtest, I get error massage "Object of class to "dist" expected". As I already have two dissimilarity matrices, shall I again compute distance measure using this function? If not, could you please let me know which function/command I can use to do? Thank you very much in

Hi everyone, Can someone explain me how to calculate SAS type III sums of squares in R? Not that I would like to use them, I know they are problematic. I would like to know how to calculate them in order to demonstrate that strange things happen when you use them (for a course for example). I know you can use drop1(lm(), test="F") but for an lm(y~A+B+A:B), type III SSQs are only

Dear All, I am analysing a dataset on levels of herbivory in seedlings in an experimental setup in a rainforest. I have seven classes/categories of seedling damage/herbivory that I want to analyse, modelling each separately. There are twenty maternal trees, with eight groups of seedlings around each. Each tree has a TreeID, which I use as the random effect (blocking factor). There are two

Hi, I have done different discriminant function analysis of multivariat data. With the CV=True option I was not able to perform the predict() call. What do I have to do? Or is there no possibility at all? You also need the predicted values to produce a plot of the analysis, as far as I know. Here my code: pcor.lda2<-lda(pcor~habarea+hcom+isol+flowcov+herbh+inclin+windprot+shrubcov+baregr,

Dear R-users Problem: Given the following system of ordinary differential euqations dM/dt = (-n)*M-h*M dS/dt = n*M-h*S+u*R dA/dt = h*S-q*A dI/dt = q*A-p*I dJ/dt = h*M-v*J dR/dt=p*I+v*J-u*R where M,S,A,I,J,R are state variables and n,h,u,q,p,v parameters. I'm able to calculate the likelihood value based on the solutions M,S,A,I,J,R of the ODE's given the data, but without an explicit

Hi there, I am running MCMCpack (MCMCirt1d model) on some files (26 items x about 800 – 1200 individuals). I have a problem. When I am working on “big” files, the R program crashes. More precisely I got the following Microsoft Warning: ******************************************* Microsoft Visual C++ Runtime Library Runtime Error! Program: C:\Program Files\R\R-2.4.1\bin\Rgui.exe

Dear R-devel, Apologies for sending what is probably a very simple question to R-devel: I am definitely missing something very simple and can't work out what it is. I've been trying to find the problem here for about a month and need some help! I am trying to work out how to run a C program from an R script. Rather than try the C program directly, I'm trying to get a much simpler

Hi Kuba, Thanks for your feedback. I have made some improvements on the proposal according to your feedback and clarify something on the time availability. I left comments on the questions you asked in the doc. Please check it out. Thanks, Chijun 2018-03-22 10:37 GMT+08:00 Jakub (Kuba) Kuderski <kubakuderski at gmail.com>: > Hi Chijun, > > I left you my feedback in the doc (+

Hi Chijun, I left you my feedback in the doc (+ some nitpicks). Overall, it looks very solid and shows you understand the problem well and know what to expect. Your proposed timeline is reasonable and I don't see any major things to improve there. Don't hesitate to reach out if you have any questions related to my comments (either here or in the document). Thanks, Kuba On Wed, Mar 21,

On Tue, Feb 13, 2024 at 06:39:20PM +0100, Danilo Krummrich wrote: > On 2/9/24 19:52, Daniel Vetter wrote: > > On Fri, Feb 09, 2024 at 06:41:32PM +0100, Danilo Krummrich wrote: > > > On 2/6/24 15:03, Daniel Vetter wrote: > > > > On Mon, Feb 05, 2024 at 11:00:04PM +0100, Danilo Krummrich wrote: > > > > > On 2/5/24 22:08, Dave Airlie wrote: > > >

I'm using an SVM as I've seen a paper that reported extremely good results. I'm not having such luck. I'm also interested in ideas for other approaches to the problem that can also be applied to general problems (no assuming that we're looking for spirals). Here is my code: library(mlbench) library(e1071) raw <- mlbench.spirals(194, 2) spiral <-

Hi Kuba, Thanks for your clarification on the project in the previous letter. I have submitted a proposal draft at the GSoC website, the draft has been shared with the LLVM organization. I will appreciate it if you can give me some advice on the proposal. This draft can be viewed by the organization. (If you do not have access, please mail me, and I will give you the link.) I am looking forward

Hi Chijun, Thanks for your interest in the project. I have gone through most of the LLVM Kaleidoscope tutorial and I have > watched the video of the presentation “Dominator Trees and incremental > updates that transcend time” presented on the 2017 LLVM Developers’ > Meeting. I have also started to understand the algorithm mentioned in > the comments of the code related to the

Hi Chijun, Great, seems like you did a lot of progress and understand the issues quite well! I have done some early sketch on the API of the new updater class. > From my current understanding, to solve the fragmentation problem of > the API, the new class first, need to maintain the DomTree and > PostDomTree class and deprecate the DefferredDominance class. > There are a couple of

Hi Kuba, Thanks for your advice in your previous letter. During last week, I have read the documents on Doxygen and the source code of the DomTreeBase/DomTree/PostDomTree/DeferredDominance class, I believe now I have a much better understanding on the relationship between these classes and how DeferredDominance class performs lazy updates. I have also learnt the current usage and drawbacks of

Hi, there! I finally became a disciple of 'R', after having lost years of my life handling data with a popular, rather wide-spread spreadsheet-software. Now I want to plot the results of many runs of my simulation over time, so that the means +/- Standard error are on the y-axis, and time on the x-axis. I have tried 'boxplot', with timesteps as the grouping variable, but did

Dear all! After hours of trying around, I gave up: I have a 2-dimensional array, and I know how to split it into its rows and how to get the mean for every row using 'sapply'. But what I want is to calculate the mean over the first n rows, and then the second n rows, etc., so that I get a vector like: v == mean1(row 1:5), mean2(row6:10),... (trivial, you might say. I find it rather

Hello, I’m an undergraduate student studying CS in the South China University of Technology. I have been using clang compiler and related tools since I started studying C++ and I would like to work on LLVM in this year’s GSoC. I am interested in “Implement a single updater class for Dominators”. [1] I have achieved a bronze medal in the 2017 ACM-ICPC Asia Xian Regional Contest [2] (being a