similar to: nls() fit to Kahnemann/ Tversky function

Halo i'm studying chemistry, today we made an experiment and i have to draw a titration kurve for my mess data. we can do it on a mm paper, or we can also use a programe. people from chemistry recomend "R" last year i studied civil eng. and we used Matlab, as I see, R ist very similar to it, but its got other comands. But i think R would be a good help for some exercises. so my

Howdy Gurus again Thanks to Tony.Breyal, I was able to writing the following script for analyzing a text document. But I got an error with "tm' package. I don't why I got the error from the R script below. I think I followed proccess of R tm manual. I use R v2.8.1. and tm_0.3-3.zip under Win XP. Thanks in advance, Kum Hwang > # setting directory > my.path

Hi I have used a polycor package for categorical correlation coefficients. I run the following script. But there were no results. Could you tell me how to correct the script? Thanks in advance, vars <- names(sdi) for (i in 1:length(vars)) { for (j in 1:length(vars)) { paste(vars[i]," and ", vars[j]) polychor(vars[i], vars[j]) # corr } } -- Kum-Hoe Hwang, Ph.D.Phone :

HOwdy I read R books about scale function for variable transformation. Acoording to this book scale function leads me to better regression results. Or am I worng? I hope somebody tell me about a scale function? Is it for variable transformation? -- Kum-Hoe Hwang, Phone : 82-31-250-3516Email : phdhwang@gmail.com [[alternative HTML version deleted]]

Hi, R Lovers! I have some survey data. I'd like to run R or R packages for processing data inputted from AHP(Analytic Hierarchy Process) survey. Are there any R packages or subsititues for running data from AHP survey. Thanks in advance, -- Kum-Hoe Hwang, Ph.D.Phone : 82-31-250-3516 Email : phdhwang@gmail.com [[alternative HTML version deleted]]

Hi Gurus! I have a job that is to get randomly samples from point-based GIS data (sp called shape GIS files) under the total sum resctricted. For example, I would like to take random smaples under the 1000 persons in each city. The randomly sampled persons should not be over 1000 any case. Thank you in advance, -- Kum-Hoe Hwang, Ph.D. Phone : 82-31-250-3283 Email : phdhwang@gmail.com

Hi R Gurus! I conducted regression and anova followings : Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 6.07e-01 5.95e-02 10.19 < 2e-16 *** nemp 2.87e-06 1.04e-07 27.63 < 2e-16 *** as.factor(corridor1)A -8.81e-02 2.13e-02 -4.14 3.6e-05 *** as.factor(corridor1)B

Hello, I have a question about modelling via glm. I have a dataset (see dput) that looks like as if it where poisson distributed (actually I would appreciate that) but it isnt because mean unequals var. > mean (x) [1] 901.7827 > var (x) [1] 132439.3 Anyway, I tried to model it via poisson and quasipoisson. Actually, just to get an impression how glm works. But I dont know how to

Howdy R gurus ! I am newbie to R I use R 2.0.1 in Windows XP. When I run R I got the follwoing memory error. My physical memory size is 3 Gb. My R got the memory problem when it reached to about 2 Gb. Thanks in advance, > library(spdep) > sfr.lagsarlm <- lagsarlm(sfr.data$Bldgsqft ~ sfr.data$Ncounty + sfr.data$Nugb + sfr.data$Ngroup, data=sfr.data, listw=sfr.listw,

Hi, Gurus Thanks to your good helps, I have managed starting the use of a text mining package so called "tm" in R under the OS of Win XP. However, during running the tm package, I got another mine like memory problem. What is a the best way to solve this memory problem among increasing a physical RAM, or doing other recipes, etc? ############################### ###### my R

Howdy Gurus I 'd like to ask a question about how to build TermDocMatrix in tm text mining package. It is not clear about importing a plain text file, and them converting that text file into TermDocMatrix file, etc to me. How can I build a TermDocMatrix of " a plain text document file for text association? Or are there any good manuals? Thank you in advance, -- Kum-Hoe Hwang, Ph.D.

> Why is the LKG build so important? Because in software development in > general, you want to reduce the "granularity" of the process as much as > possible, approximating a kurve rather than a series of steps. If people > adopt LLVM v3.1 and then have to wait one year for another update (v3.2) in > which LOTS and LOTS of things have changed, they are in for a tough ride

Howdy I apologize for duplicated posting. But I decided to correct my previous posting. I had the regression results using r <- lm(Y ~ nemp + as.factor(devt), data=d). First, there is the result of anova(r). Here I could not find regression coefficients. Response: Y Df Sum Sq Mean Sq F value Pr(>F) nemp 1 58.2 58.2 1233.23 < 2e-16 ***

Hi, I have several times over the past three months tried to retrieve the trunk version of LLVM/Clang/Compiler-RT from Subversion and then tried to build it on Windows: Without success. Also, I occasionally get emails from people who ask me why LLVM/Windows does not build (they find my name in the mailing list archive). This has made me ponder the issue and I came up with the following scheme

Howdy, R Grues I have enjoyed R, but I cannot solve one problem easily. Please help my problem. When I tried the R script, I got the following Error. This error results from input data file exported through a Excel spreadsheet software. Error in step(lm(pop.rate ~ as.numeric(year) + as.factor(policy) + as.numeric(nation.grant) + ?: ??number of rows in use has changed: remove missing values?

please help. why is it that i cannot open html help pages out of the R menu? here is what I do: using browser firefox1.0 (open source!), java plugin jre 150 installed, supposedly working properly. opening R201patched, html help, link:search engine and keywords: works properly, jre symbol appears. clicking on any link (keywords on that page): no reaction whatsoever. what am i doing wrong?

Dear WizaRds, although this might be a trivial question to the community, I was unable to find anything solving my problem in the help files on CRAN. Please help. Suppose I have 4 variables and want to use all possible combinations: 1,2 1,3 1,4 2,3 2,4 3,4 for a further kmeans partitioning. I tried permutations() of package e1071, but this is not what I need. Thank you for your help and

| Do you have any information about how people are setting up their | projects? I ask because there are different ways to set up a project | to depend on LLVM. No, I don't have that kind of information. All I know is that it is quite difficult to find a working version on the trunk. I think this especially hit those that are new to LLVM and yet want to play around with the bleeding edge

Dear WizaRds! A trivial question indeed on selecting subsets in data frames. I am sorry. Unfortunately, I did not find any helpful information on the introduction, searched the help archive and read in introductory books. Please help: I want to select column "KB" which is read via read.csv2 as a data.frame into d. I checked that it is indeed a data.frame object and included the

Howdy What I 'd like to analyze with a large data on building permits is to find time series effect of urban policy on buildings as well as cross-sectional effects in any. In 1990 the specialZone urban policy was introduced. I guess that the effects of this specialZone policy would be different from countys. There are counties that do not welcome this specialZone forced to design it. One of