search for: smirnov

Hi, I have a problem with Kolmogorov-Smirnov test fit. I try fit distribution to my data. Actualy I create two test: - # First Kolmogorov-Smirnov Tests fit - # Second Kolmogorov-Smirnov Tests fit see below. This two test return difrent result and i don't know which is properly. Which result is properly? The first test return lower D = 0.0...

Hi everybody, while performing ks.test for a standard exponential distribution on samples of dimension 2500, generated everytime as new, i had this strange behaviour: >data<-rexp(2500,0.4) >ks.test(data,"pexp",0.4) One-sample Kolmogorov-Smirnov test data: data D = 0.0147, p-value = 0.6549 alternative hypothesis: two.sided >data<-rexp(2500,0.4) >ks.test(data,"pexp",0.4) One-sample Kolmogorov-Smirnov test data: data D = 0.019, p-value = 0.3305 alternative hypothesis: two.sided >data<-rexp(2500,0.4) >ks.te...

Is the kolmogorov-smirnov test valid on both continuous and discrete data? I don't think so, and the example below helped me understand why. A suggestion on testing the discrete data would be appreciated. Thanks, a <- rnorm(1000, 10, 1);a # normal distribution a b <- rnorm(1000, 12, 1.5);b # normal distributio...

I got a distribution function and a empirical distribution function. How do I make to Kolmogorov-Smirnov test in R. Lets call the empirical distribution function >Fn on [0,1] and the distribution function >F on [0,1] ks.test( ) thanks for the help -- View this message in context: http://www.nabble.com/Kolmogorov-Smirnov-test-tp23296096p23296096.html Sent from...

...imate Std. Error shape1 2.148779 0.1458042 shape2 810.067515 61.8608126 Loglikelihood: 1917.51 AIC: -3831.02 BIC: -3823.15 Correlation matrix: shape1 shape2 shape1 1.0000000 0.8880194 shape2 0.8880194 1.0000000 now if i do : >gofstat(fit1, print.test=TRUE) Kolmogorov-Smirnov statistic: 0.06630064 Kolmogorov-Smirnov test: not rejected The result of this test may be too conservative as it assumes that the distribution parameters are known Cramer-von Mises statistic: 0.3866663 Crame-von Mises test: not calculated Anderson-Darling statistic: 2.820576 Ander...

Although I saw this issue being discussed many times before, I still did not find the answer to: why does R can not calculate p-values for data with ties (i.e. - sample with two or more values the same)? Can anyone elaborate some details about how does R calculate the p- values for the Kolmogorov Smirnov test statistics? I can understand the theoretical problem that continuous distributions do not generate ties, but again - why isn't it possible to calculate accurate p-values with ties? how does it work? what is the procedure to calculate p-values for the Kolmogorov Smirnov test statistics? T...

...at saepia.net <marcin at saepia.net> > Android MediaPlayer works properly with Icecast streams but especially > older APIs don't support extracting metadata. I have a solution for this so > if you are interested, catch me on priv > > m. > > > 2013/7/24 Konstantin Smirnov <konstantin.e.smirnov at gmail.com> > >> Hello. >> What is the official info about IceCast Android MediaPlayer support? >> From which version of Android IceCast 2.3.2-kh29 supports Android >> MediaPlayer if it does? >> What are other technical requirements to...

Hi r-users,   I would like to use Kolmogorov smirnov test but in my observed data(xobs) there are ties.  I got the warning message.  My question is can I do something about it?   ks.test(xobs, xsyn)           Two-sample Kolmogorov-Smirnov test data:  xobs and xsyn D = 0.0502, p-value = 0.924 alternative hypothesis: two-sided Warning message: In ks...

I'm trying to use modified Kolmogorov-Smirnov test with a Normal which I don't know it's parameters. Somebody told me about the lilifor function in R, but just can't find it. Does anybody know how I can test with the modified Kolmogorov-Smirnov test? Porqu? usar una base de datos relacional cualquiera, si pod?s usar PostgreSQL? -...

Hi, I was wondering whether there is an implementation of the Kolmogorov-Smirnov goodness of fit test for discrete, ordinal scale data in R - I've only managed to find the test for continuous data. Thanks! Gila

Hello, I am curious if anyone has had any success with finding a R version of a k-sample Kolmogorov-Smirnov test. Most of the references that I have able to find on this are fairly old and I am wondering if this type of analysis has fallen out of favour. If so, how do people tend to compare distributions when they have more than two? Is it reasonable to pursue an adjusted p-value method. That is, could y...

...5445 [13,]       10   9.0345 [14,]       16  20.9220 Results: > chisq.test(obs_data, p = pre_gam, rescale.p = TRUE)         Chi-squared test for given probabilities data:  obs_data X-squared = 205.4477, df = 13, p-value < 2.2e-16 > ks.test(obs_data,pre_gam)         Two-sample Kolmogorov-Smirnov test data:  obs_data and pre_gam D = 0.2143, p-value = 0.9205 alternative hypothesis: two-sided Am I doing the right thing? Thank you so much for your help. [[alternative HTML version deleted]]

Hi, why don't you try try ks.test(VeriSeti1, VeriSeti2)$p.value All the best Jenny >How can i print only the P-Value of the kolmogorov smirnov test? > > >> ks.test(VeriSeti1, VeriSeti2) > > Two-sample Kolmogorov-Smirnov test > >data: VeriSeti1 and VeriSeti2 >D = 0.5, p-value = 0.4413 >alternative hypothesis: two-sided > > >This expression gives me the whole test results, i need only the p-val...

Dear R providers and users, I need to compare two sets of data coming from two different multivariate distributions. I would like to apply a two sample Kolmogorov Smirnov test in multivariate case. Is there any R code or package ? Your help is highly appreciated. Many thanks, Esmail Amiri. ____________________________________________________________ Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at htt...

Hi - A little while ago I posted a question about the implementation of a two-dimensional analog of the Kolmogorov-Smirnov test in R[1][2]. As there isn't one, as far as I know, people might be interested in a very fast C++ implementation called MUAC which is available as a function and as a standalone program from http://www.acooke.org/jara/muac/index.html. Apparently the code is interesting from a compu...

Dear List, I am new to R and find it very powerful. I would like to compute the permutational p-value for paired data using Kolmogorov-Smirnov, but the built-in ks.test does not have this option, unlike the t.test which has a paired=TRUE flag. Has someone written a library or a routine that does this? Alternatively, if someone could show me how to do pair-wise permutations in R, then I can compute the ks statistic for each permutation, th...

...rocess stops and does nothing. (Here is a screenshot http://www.picshare.ru/view/171508/). I tried to install versions 0.11.0.308 and 0.11.0.357. For 32-bit and 64-bit systems Windows XP, Windovs Vista and Windows 7. Everywhere the same effect. Can anybody help me? -- Best regards Valery V.Smirnov

I am hereby forwarding the data & method use to calculate the Kolmogorov-Smirnov goodness of fit test made manually by me in R launguage which deffers with the actual inbuilt formula as shown below. Further I have plot the graph in R. In that graph how to add trendline (i.e. straight line passing through maximum points in plot) to a Plot. R script is as follows please run th...

Dear R-users, I want to perform a One-Sample parametric bootstrapped Kolmogorov-Smirnov GoF test (note package "Matching" provides "ks.boot" which is a 2-sample non-parametric bootstrapped K-S version). So I wrote this code: ---[R Code] --- ks.test.bootnp <- function( x, dist, ..., alternative=c("two.sided", "less", "greater"), B =...

Hi I am conducting 2-sample Kolmogorov Smirnov tests for my Masters project to determine if two independant tree populations have the same size-class distribution or not. The trees have been placed into size-class categories based on their basal diameters. Once I started running the stats on my data, I got confused with the results. Just to sho...