Re: [R] counting the number of ones in a vector

The length will remain the same no matter what expression appears in the subscript. I suggest this: sum(x == 1) David Reinke Senior Transportation Engineer/Economist Dowling Associates, Inc. 180 Grand Avenue, Suite 250 Oakland, California 94612-3774 510.839.1742 x104 (voice) 510.839.0871 (fax

Re: [R] text editors

quot; in Wikipedia, which gives some general advice; it also has links to comparisons of text editors and a link called 'editor war' (Emacs vs other editors). A cardinal rule in among developers is never to try to convince someone else that your text editor is better, so tak

Re: [R] book about "support vector machines"

http://www.miketipping.com/ There is also a good description of RVM in Bishop's book: Pattern Recognition and Machine Learning. David Reinke Senior Transportation Engineer/Economist Dowling Associates, Inc. 180 Grand Avenue, Suite 250 Oakland, California 94612-3774 510.839.1742 x104 (voice) 51

Re: [R] Method for checking automatically which distribtions fits a data

The function ks.test(x,y, ...) performs a Kolmogorov-Smirnov test on a set of sample values x against a distribution y. Both x and y must be cumulative distributions; y can be either a vector of cumulative values or a predefined distribution such as pnorm(). David Reinke Senior Transportation

Re: [R] calculation of entropy in R???

building block for anything more complex. My approach for getting H(X|Y), etc. is to get a contingency table, then calculate conditional entropy and mutual information from the table. You might also consult a text such as Cover & Thomas, Elements of Information Theory. Regards, David David R