[R] Need help with self-defined function to perform nonlinear regression and get prediction interval

Dear All, I was trying to call a self-defined function that performs nonlinear regression and gets the corresponding prediction upper limit using nls2 package. However, weird thing happened. When I called the function in the main program, an error message "fitted(nlsmodel): object 'nlsmodel' not f

Re: [R] How to compute the power of a wilcoxon test?

on of the two samples is -0.053. Thanks, Tianchan From: Peter Dalgaard-2 [via R] [mailto:ml-node+s789695n3815852...@n4.nabble.com] Sent: Thursday, September 15, 2011 11:04 AM To: Tianchan Niu Subject: Re: How to compute the power of a wilcoxon test? On Sep 15, 2011, at 15:47 , tn85 wrote: > H

[R] How to compute the power of a wilcoxon test?

Hello All, I posted a similar question before, but the direction was driven to whether my case is suitable for a wilcoxon test. After research about the appropriateness, I am pretty sure that a wilcoxon test is the right tool for my case. But how to compute the power of the test is still an unansw

[R] How to calculate the power of Wilcoxon signed rank test

Hello All, I perform a Wilcoxon signed rank test for two sets of data to test whether they two have significantly different means. I would also like to know the power of this test. The third part of this tutorial is similar to what I want except the t distribution. http://www.cyclismo.org/tutori

[R] How to map current Europe?

Hello All, I was trying to generate a map of Europe with the following codes: europe<-map(database="world", fill=FALSE, plot=TRUE,xlim=c(-25,70),ylim=c(35,71)) However, the "world" database is too old to have right European country names. Could anyone help? Thanks, Tianchan -- View this messa