search for: dataplot

Dear Professor I have read your questions in the website on Doubly non-central F-distribution. I am looking for source code for evaluating this function now. I have matlab code but it's only accurate up to the 4th decimal point. Dataplot is more accurate, but it is not user friendly as you only can evaluate one function at a time. So I would like to know do you have found any R code for evaluating doubly non-central F-distribution. If so, can you share it with me? Thanks a million in advance! Best regards Haixia ---------...

IIRC, the license stated in the source code of dataplot is rather restrictive. I don't think one is allowed to use the source as can be done with GPL code. Cheers, Andy > -----Original Message----- > From: Brett A Magill [mailto:Brett.Magill at slps.org] > Sent: Thursday, June 27, 2002 1:14 PM > To: r-help at stat.math.ethz.ch > Su...

The function wtd.var(x,w) in Hmisc calculates the weighted variance of x where w are the weights. It appears to me that wtd.var(x,w) = var(x) if all of the weights are equal, but this does not appear to be the case. Can someone point out to me where I am going wrong here? Thanks. Tom La Bone [[alternative HTML version deleted]]

...orrelation line is parallel displaced depending on a clinical condition. I thought to a Tukey Mean Difference Plot would show me the difference betweenthe two values. I don't have the literature how the plot gets constructed, but my understanding from http://www.itl.nist.gov/div898/software/dataplot/refman1/auxillar/meandiff.htm is that the first from each distribution a qq plot is constructed and than the coardiantes of the qq-plot are transformed according the formula x=x+y/2 and y=x+y. I tried this with tmd(xyplot(a ~ b| c, data=data)) with a and b holding my log10 transformed numeric...

Have a look at the GUI on dataplot, NIST's plotting software. It is implemented in tcl/tk. The site states it is "public domain software" -- open source? I can't find anything about the license. In any case... http://www.itl.nist.gov/div898/software/dataplot/ Brett A. Magill, Evaluator Research, Assessment,...

...term in the model contains a square-root, but in the course of regression, this term turns negative and an error occurs. I started using Micrsoft's Excel Solver, and then I turned to NIST's Datplot statistical package. I can constrain in Solver, but it violates those constraints. :) Dataplot does not have the capability to constrain parameters. Does R have the capability to constrain or bound parameters in non-linear regressions? Thanks, Mark Davis

...w, once click it, it pops up a individual plot device: individual_plot <- function() { tkconfigure(overlay.button, state="normal") options(locatorBell = FALSE) plotfuntype() trellis.focus("panel", 1, 1,highlight=FALSE) panel.identify(labels=colnames(dataplot)) } Now I have another button, originally state="disabled", but activated by : tkconfigure(overlay.button, state="normal") in previous function: The overlay function was writen to overlay another plot to the original plot. --The problem: 1. once the plot device is out,...

hi! I would like to ask help how to generate numbers from g-and-h distribution. This distribution is like normal distribution but span more of the kurtosis and skewness plane. Has R any package on how to generate them? Any help will be greatly appreciated. Thank you so much! Form, Filame Uyaco --------------------------------- [[alternative HTML version deleted]]