similar to: variable selectin---reduce the numbers of initial variable

Dear list, Did anybody have something like multiroot(), similar to uniroot() only for several varibles/function? I know the difficulty several varibles bring. But for nice functions, it can be useful. We are thinking of writing one....I thought to ask first. Mai Zhou -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Hello all, I am trying to use stepwise procedure to select covariates in Cox model and use bootstrap to repeat stepwise selection, then record how many times variables are chosen by step() in bootstrap replications. When I use step() (or stepAIC) to do model selection, I got errors. Here is the part of my code for (j in 1:mm){ #<--mm=10 for (b in 1:nrow(reg.bs)){ #<--bootstrap 10

Hello, I wonder when I do coxph in R: coxph( Surv(start, stop, event) ~ x, data=test) If x is a categorical varible (1,2,3,4,5), should I creat four dummy varibles for it? if yes, how can I get the overall p value on x other than for each dummy variable? Thanks Lisa Wang Princess Margaret Hospital Phone 416 946 4501

hi everyone, I am wondering if I can inintial all of the varibles and vectors at the begining part of my R script to make clear all the meanning defined in another script runned before It is just similiar with the command " close all " in Matlab or "reinit " in grads.How can I do? thank you.:) -- TANG Jie Email: totangjie@gmail.com Tel: 0086-2154896104 Shanghai Typhoon

Hello, I'm running samba 3.02 on freebsd 4.7. Client systems are WinXP Pro Srv Pk 1. Anyway, the logon script has issues, I added a pause statement to view it. It says: There are open files and/or incomplete directory searches pending on the connection to Z: The command completed successfully. Z:\>NET USE H: /HOME The current directory is invalid. END. Where did Z: come from??? I

Dear all, Some functions like 'ROC(Epi)' can be used to perform ROC analyssi, but it needs us to specify the fitting model in the argument. Now i have got the predicted p-values (0,1) for the 0/1 response variable using some other approach, see the following example dataset: id mark predict.pvalue 1 1 0.927 2 0 0.928 3 1 0.928 ..................

Hello forum, I want to find in survey how to test V-cramer and coefficient Goodman-Kruskal gamma, to test the collinearity between varibles to enter a model. For the V-Cramer function is used with the package vcd assocstats but without considering the survey package. I appreciate the cooperation. Att. Diana Martinez [[alternative HTML version deleted]]

Is it possible to check certain varibles on the live system, for example, what the current setting for pridialplan is? I know what is set in the config files, but the behaviour does not reflect this. Can this be checked? Kind Regards: Gabriel -------------- next part -------------- An HTML attachment was scrubbed... URL:

What does Generalized Cross Validation score mean. I preform and ordisurf on an ordination (nmds) with an environmental variable. I am trying to figure out "how well" the environmental varibles predict/explain the sites placements in species space. Any help would be greatly appreciated. Any pointers to literature... would be welcome. thanks in advance, -- Stephen Sefick Research

hi, I have question. I worte r function that suppsoe ti return x and y to me. when I use that function in the middle of a code ( i use source) it give me the value of x,y but when i write x,ro y it says (not found). so my question is that I want when i load this function to return the varibles x and y beuse the rest of my code depends on thse variables. Thank you HI

This topic refer to independent variables reduction, as we know ,a lot of method can do with it,however, for pre-processing independent varibles, a method like the sentence below can reduce many variable, How can I understand it? what is significant correlation at 5% level, what is the criterion? P value?or what? "Independent variables whose correlation with the response variable was not

I've been building a ranked dot plot for several days now and am sorting the data using the reorder command. What I don't understand is how reorder works when mutiple varibles are plotted by grouping. In the example below I'm using re-order to sort by a variable name Resv_Prop, but I'm plotting up to three different values of Resv_prop (different Year values) for each factor.

HI,All I am trying to create a heatmap with 24 samples with 15672 varibles, I read in the table in R, and then made it as a matrix, then try to create the heatmap using heatmap(x,...) However, I received the error message as: > heatmap(t(x)) Error: cannot allocate vector of size 936.8 Mb R(2925,0xa0b16500) malloc: *** mmap(size=982261760) failed (error code=12) *** error: can't allocate

The attached file contains some simple functions that manipulate volatile varibles. The functions near the top of the file should turn into code that loads from x and then stores to it. The LLVM version on the web (not sure if it's the latest...) gets most of these wrong. John Regehr -------------- next part --------------

We are running samba on a number of HP systems running HP/UX 11.00. We moved from samba version 2.0.7. to samba version 2.2.3a. We have about 200-400 smbd's running on one host. Samba version 2.2.3a was running without any problems for about two weeks. But now on two different servers indepent of each other, the file table was full. We found out that ONE smbd used about 5000 !!

Hello, Can anyone help me out with this problem? After performing logistic regressions and testing the significance with likelihood ratios, I have plotted the results using "termplot". I am wondering, how to get the names of my variables to appear on the x-axis rather than ascending numbers? I have used: termplot(fm, se=T, axes=FALSE, col.se="black") axis(1, 1:4,

for those of you using it now (aug 2011), the artifacts persist but a simple click with a text selectin tool clears them!

Thank you for Prof.Ripley's suggestion. I fixed the program by adding a lower scope, and the program ran, but I still got warning messages, and don't know what is going on, would this affect my results? ... Step: AIC= 12337.74 Surv(tlfup, cen) ~ MI[[j]]$trt + MI[[j]]$agem40 + MI[[j]]$agem40sq + mhtypeed1 + mhtypeed2 Df AIC <none> 12338 -

Hello, I'm planning to install centos 4.2 x86_64 on a Poweredge 2800. This system comes with a EFI utility partition and has software called Server Assistant wich helps you to install your OS so that things like RAID and such can get monitored in an 'indepent' way afterwards through this EFI partition. When booting into the Server Assistant (the software is on a linux liveCD btw) I

Thanks Bill. Do you and others think that a link to this guide (or another)should be included in the Posting Guide and/or R FAQ? -- Bert On Tue, May 17, 2011 at 4:07 PM, <Bill.Venables at csiro.au> wrote: > Amen to all of that, Bert. ?Nicely put. ?The google style guide (not perfect, but a thoughtful contribution on these kinds of issues, has avoiding attach() as its very first line.