search for: stress

...is a copy of my work: >mdsg=read.csv(file.choose(), header=TRUE, row.names=1, sep=",") > mdsg.mds<- metaMDS(sp.rich) Error in metaMDS(sp.rich) : object 'sp.rich' not found > mdsg.mds<- metaMDS(mdsg) Square root transformation Wisconsin double standardization Run 0 stress 10.62813 Run 1 stress 14.73774 Run 2 stress 11.19939 Run 3 stress 10.61520 ... New best solution ... procrustes: rmse 0.005646588 max resid 0.009332332 Run 4 stress 10.61520 ... New best solution ... procrustes: rmse 0.0001009763 max resid 0.0001754211 *** Solution reached > mdsg.mds.A...

...LVM, I'm currently setting up some tools to investigate the influence of the order of optimization passes on the performance of compiled programs -nothing exceptional here. I noticed something inconvenient with opt, namely that splitting a call does not always give the same output: % llvm-stress > stress.ll % opt -dse -verify -dce stress.ll -o stress-1.bc % opt -dse stress.ll | opt -dce -o stress-2.bc % diff stress-{1,2}.bc Binary files stress-1.bc and stress-2.bc differ The difference seems meaningful; it's ~180 bytes out of ~1400 bytes of output in my random case. I can't de...

...a model with the lmer function including some main effects, a two-way interaction and a random effect. Now I am searching how I could incorporate an interaction between the random effect and one of the fixed effects. I tried to express the interaction in: recap_random3<-lmer(breath~handling+stress+stress:handling+(1|rnr)+(0|rn r:stress)) however R gives me the following error message : Error in eval(expr, envir, enclos) : fl[[2]] must be a factor of length 1744 In addition: Warning messages: 1: numerical expression has 1744 elements: only the first used in: rnr:stress 2: numerical exp...

.... I don't know of this information is stored in the bytecode file as well. < ; preds = %CF, %CF80, %CF78 > ; preds = %CF80, %CF, %CF78 FWIW, the conflicting section of the bytecode file is likely not a permutation because the byte patterns don't match (some of the btte values of stress-1.bc are not present in stress-2.bc). Thanks for your help :) Sébastien Michelland On 5/24/19 5:32 PM, Eli Friedman wrote: > Are you passing -preserve-ll-uselistorder when you create the .ll files? It's off by default because the output tends to be sort of unreadable, but it could explain...

...dst, 3) > WriteVectorFile(vec1, "outfile") > vec2 <- ReadVectorFile("outfile") > cor(vec1[,1], vec2[,1]) [1] 1 > cor(vec1[,2], vec2[,2]) [1] 1 > cor(vec1[,3], vec2[,3]) [1] 1 > v1 <- SAMMON(dst, 3, y=vec1) Loading required package: MASS Initial stress : 0.20243 stress after 10 iters: 0.11869, magic = 0.018 stress after 20 iters: 0.07572, magic = 0.043 stress after 30 iters: 0.05346, magic = 0.491 stress after 40 iters: 0.04985, magic = 0.500 stress after 50 iters: 0.04945, magic = 0.500 stress after 60 iters: 0.04931, magic =...

Hi, I want to know whether there is any function in R to find STRESS after using cmdscale and estimating the coordinates, I have written these functions to find stress (for p =1,2,3,4,5) stress<-rep(0,5) for(p in 1:5) { datahat<-cmdscale(d,p) deltahat<-as.matrix(dist(datahat)) a<-0 b<-0 for(i in 1:n) { for(j in 1:n) { a<-d[i,j]^2+a b<-(d[i,j]-...

...hat objective function is maximized by survreg with the default Weibull model? I'm getting finite parameters in a case that has the likelihood maximzed at Infinite, so it can't be a simple maximum likelihood. Consider the following: ############################# > set.seed(3) > Stress <- rep(1:3, each=3) > ch.life <- exp(9-3*Stress) > simLife <- rexp(9, rate=1/ch.life) > Data <- data.frame(Stress=factor(Stress), + Time=pmin(simLife, 50), dead = (simLife<=50)) > Data[1:3,] Stress Time dead 1 1 50 FALSE 2 1 50 FALSE 3 1 50 F...

Hi R-Help! My question: I have lifetime/failure data of machines with different stress levels and i think an weibull/extreme value distribution would fit this data. So I did: model1 <- survreg(Surv(lfailure)~stress,data=steel,dist="extreme") (where lfailure=log(failure)) Now I would like to do a likelihood ratio test to test the hypothesis H0: location paramete...

...he bytecode file as well. > > < ; preds = %CF, %CF80, %CF78 >  > ; preds = %CF80, %CF, %CF78 > > FWIW, the conflicting section of the bytecode file is likely not a > permutation because the byte patterns don't match (some of the btte > values of stress-1.bc are not present in stress-2.bc). > > Thanks for your help :) > Sébastien Michelland > > On 5/24/19 5:32 PM, Eli Friedman wrote: > > Are you passing -preserve-ll-uselistorder when you create the .ll > files?  It's off by default because the out...

I''m experimenting with xen + iscsi, and I founded that under heavy stress domU''s can crash entire system, I''ve reproduced this many many times. My system is like this Software: - iSCSI Enterprise Target v0.4.13 - RedHat AS4 update 4 64bit + Xen 3.0.3-0 Kernel 2.6.16.29 + Open iSCSI v2.0.730 (Initiator) - Bonnie++ v1.03a VM: - Debian 3.1r3 + Open iSCS...

Hello, We are trying to find a function to compute "stress" in our multidimensional scaling analysis of a dissimilarity matrix. We've used "dist()" to create the matrix and "cmdscale()" for the scaling. In order to determine the number of dimensions we would like to plot stress vs. dimensions. However, we cannot find a pre-made...

Hi all, I try to calculate the stress of a configuration using the formula in the isoMDS help, but I don't have the same result than the stress returned by isoMDS : > library(mva) > library(MASS) > data(swiss) > swiss.x <- as.matrix(swiss[,-1]) > swiss.dist <- dist(swiss.x) > swiss.mds <- isoMDS(swiss.di...

Among those users of Primer, stress values greater than 0.3 are interpreted as "questionable". Using both isoMDS and metaMDS (vegan package), the stress values returned are much higher using my own data and using examples provided in R Help. For example Rstress = 8.3, and the stressplot r2 = 0.99 indicating (to me) that t...

...m as follows: library(MASS) data = read.table('problemforr.dat') y = cmdscale(data, add=TRUE) s = sammon(data, y$points) (In case it should be relevant, I make the data available at http://idi.ntnu.no/~edsberg/problemforr.dat) With R 2.2.1 on Debian Sid I always get one of two solutions (stress 1.74288 after 10 iterations or stress 1.33629 afer 9 iterations). I always get the same result within the same R session, even if I read the data again. With R 2.2.0 on SunOS 5.9 I always get the same result (stress 0.13186 after 74 iterations). I understand that the sammon algorithm is very sensi...

Hi, I am looking for the best multidimensional configuration for my data (47*47 distance matrix). I ve tried classical metric (cmdscale) and non metric MDS (isoMDS, nmds) but it is now difficult to choose the best solution because of the uncertainties in the definitions of the "stress" function. So, same problem, several questions : 1. Statistical consideration : With "cmdscale" we get eigen values. What is the best way to choose optimal dimensionality? With the eigen values and corresponding GOF like we do with PCA ? If I compute stress1, does it make any sense...

...case isoMDS was trapped. Nonetheless, I still have some problems with other data sets. Therefore I would like to know if anyone here has experience with how well isoMDS performs in comparison to other non-metric MDS routines, like Minissa. I have the feeling that for large data sets with a high stress value (e.g. around 0.20) in cases where the intrinsic dimensionality of the data cannot be significantly reduced without considerably increasing stress, isoMDS performs worse (and yields a stress value of 0.31 in my example), while solutions tend to be similar for better fits and lower intrins...

Hi All, I was wondering, what tools are readily available out there in Asteriskland for me to use in stress/load testing asterisk box I have in the lab. I want to observe how my box holds out under heavy/light/medium load. Thanks, Jeng ___________________________________________________________ Want ideas for reducing your carbon footprint? Visit Yahoo! For Good http://uk.promotions.yahoo.com...

I could do this in various hacky ways, but what's the right way? I have a nice application of the by function, which does what I want. The output looks like this: > auc_stress lab.samples.stress$subid: 2 cortisol amylase 1 919.05 6834.8 --------------------------------------------------------------------------------------------------------------------------- lab.samples.stress$subid: 3 cortisol amylase 11 728.25 24422.05 etc. What I want is a data frame rou...

We are in the process of implementing realtime voicemail. I was wanting to "stress-test" the system to see if or when it would fall over. Is it possible to use sipp to create say 250 calls, each of which leaves a message in the voicemail ? My dialplan is currently [default] exten => stress,1,Answer() exten => stress,2(vm),Voicemail(7777|su) exten => stress,3,Ha...

Hi, How can I stress test an asterisk IVR? I am looking for some kind of sip phone which can be "programmed" to send out digits after specified time to simulate users pressing menu items. If it can originate large number of calls simultaneously then it's great! Does any one have any recommendations ? Any...