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Works perfectly - thanks scrogster!

This works very well if there are absolute values for all of the boundaries. The problem that I have is setting the value of par[2] as the lower bound of par[3]. Do you have any suggestions on how...

I would like to know how to impose boundaries on the parameter space which is being search for a maximum likelihood. The function with which I'm working is:



rc.llike <- function(phi,x,n,t){
...

I recently came across this site. I found it very useful for physics tutoring. In addition to free-hand drawing, it supports latex equation editing.

http://www.scriblink.com/

You might also want to look at SOFA Statistics (http://www.sofastatistics.com/home.php).

SOFA (like PSPP) does not have the full functionality of SPSS, but it does provide a very friendly...

I am attempting to replicate a network that follows the cognitive development of the balance scale (Shultz, Mareschal, Schmidt. Machine Learning 16, 57-86. 1994.) After evaluating several tools for...

It's much more of a statistics question than an R question - I don't know how to analyze categorical data from a design that mixes between and within subject factors.

It looks like generalized...

For almost all computations and analyses, I use R. I'm a physicist, so I don't have much formal training in statistics - and unfortunately, all the sources that I typically use don't discuss mixed...

From a somewhat ill-designed education experiment, I have categorical data with two between subject variables and one within subject variable. Since it is categorical (essentially counts of answer...

I prefer zotero - which is a plugin for firefox.

http://www.zotero.org/

If these plots will be used in a latex document, I highly recommend TikZ, PGF and/or PGFPlots.

For Examples:
http://www.texample.net/tikz/examples/

For Downloads:...

Accentuate does support a 2 screen wide beamer slide with the correct options selected.

I'm the same as ravenon.

Are there any cognitive scientists who build models out there? I'm starting a dissertation project which will attempt model associative learning of scientific misconceptions. Modeling is new...

I would like to know about this as well.

In the past, I have deleted sections that were not imported into LyX correctly and inserted a TeX box into the document with the correct LaTeX - but it...

Thanks for your help. I recently came to the same conclusion.

I am already an R user, so it seemed like a good choice!

I'm looking for a good text in statistical theory... does anyone have recommendations?

A bit about myself and what I'm looking for:
I'm a PhD candidate in physics - so I have a strong math...

I am having the same problem. What pdf viewer supports the 2-screen presentation?

Thanks for your reply. Oddly enough, the histogram function has worked a couple times. The site shows that there have been something like 17000 downloads (if I remember correctly)... so hopefully...

I installed the addon for Calc that allows Calc to serve as a sort of front-end for R.

http://wiki.services.openoffice.org/wiki/R_and_Calc

I am able to output from R scripts to Calc, but I...

It depends on what you want to do with the plots. For something very similar to a graphing calculator, try Extcalc.

The following resource letter appeared recently in the American Journal of physics... it seems pertinent to the discussion:

Resource Letter CP-2: Computational Physics
AJP -- April 2008 -- Volume...

Many computational physicists use C and C++. I have also read that Fortran 95 has most of the same functionality as C++.

Depending on your programming experience, however, Python is probably the...