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Hello list, Is there any way to perform a block comment in R? In C++, anything in between a /* and */ is considered a comment, and it allows programmers to comment out chunks of code for testing and debugging. Is there...

Greetings list, In my code, I have a few small functions that are called very very frequently. An example of one such function is the following : sigmoid<-function(x) 1/(1+exp(-x)) Now, is there anyway to make this...

Hello list, I have a function that I wrote in C to be called in R. I've done that using symbol.C, which is the method I came across on the internet. Now that it's supposed to be...

On 4 Oct 2006, at 09:03, Robin Hankin wrote: > Hi Wee-Jin > > check out R-and-octave.txt, on the contributed docs section of CRAN. > > > HTH > > Robin > > -- > Robin Hankin > Uncertainty Analyst > National Oceanography Centre, Southampton > European Way, Southampton SO14...

Greetings list, I have a rectangular 20 x 20 matrix with values in the range of [0 , 1]. I'd like to plot it as an image. To that end, I have used the image() function that seems to do...

Thank you!!! That was the problem and now it's solved. Thanks for providing a fresh pair of eyes. Regards, Wee-Jin On 2 Dec 2006, at 15:17, Antonio, Fabio Di Narzo wrote: > > here 'steps' is double, was integer...

On 5 Oct 2006, at 08:39, Robin Hankin wrote: > Hi Wee-Jin > > you can block out bits of R code with > > if(FALSE){ > <code not executed> > } > > For the line breaking, R deals with incomplete lines by not > executing the...

Greetings list, I've just swapped from the "neural" package to the "nnet" package and I've noticed that the training is orders of magnitude faster, and the results are way more accurate. This leads me to wonder, what training...

> > One example among many: I tell it > > library (gam) all I get is an error message. > > Error in library (gam) : there is no package called 'gam' > > Well, does this mean what it says, or does it mean something > different? For...

Hello there, I'm back again with another question about the neural network package. I'm having trouble getting the network to run for the maximum number of iterations. It always stops early, usually after 100 iterations claiming to have...

Hello again list, I thought I'd start a new thread, seeing as it's completely different from my previous question. Some functions I have written require many parameters, and so do not fit nicely into an 80 column width...

Hello, I would like to make a plot (preferably lines, but points will do too), where the line segment changes color depending on the value of the y-axis. For example, let's suppose the y-axis range is from...

> > This isn't in R-and-octave.txt: I'll add it when I get a minute. > > And come to think of it, R-and-octave.txt doesn't mention plot3, > probably because it's not implemented in octave AFAIR...

Hi, Just type mean.default without the () and the code of the function will be displayed. Wee-Jin On 24 Nov 2006, at 06:31, Lize van der Merwe wrote: > Dear list > > I need to see the code behind a...

Greetings list, I'm currently in the process of migrating some Matlab code to R. It's going well, but I'm running into trouble with plotting. There are a few questions I have. 1) Is there any way to...

Hello, Have a look at the function iconv, which converts a character vector from one encoding to another. If you're not interested in converting from one encoding to another, and just want any character vector to be encoded as...

Greetings list, Is there a way of creating a simple feedforward neural network with AMORE? I know this is possible using the "neural" package, but that package is rather slow compared to AMORE. It seems that AMORE needs a vector...

Hello, I know this must be a very simple problem, but I can't work it out from the documentation that is available. I've got a list of data I would like to plot (the weights of a single...

Just to add to this, I also need to know what language is the "nnet" package written in? Is it in pure R or is it a wrapper for a C library. It really is performing very quickly, going through...