search for: orthagon

...s are the same, but the regression coeficients are different: as.vector(coef(l.poly)) 1.806618 88.078858 16.194423 58.051642 as.vector(coef(l.poly.raw)) -0.1025114 1.5265248 2.0617970 2.7393995 When using continuous data in both Y and X, does the difference between "raw" and "orthagonal" polynomials have any practical meaning? Thanks, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341

...don't understand in ns() that uses qr() to > postprocess the output from spline.des. I assume this is involved > somehow in imposing the boundary conditions... > > Thanks again everyone for your help, > -- Nathaniel The ns and bs function post-process the spline bases to get an orthagonal basis matrix, this is the use of qr. I think this causes much more grief than it is worth, for the sake of a small increase in numeric stability. For instance when you plot the spline bases, they don't look anything like the basis functions one would expect. (Perhaps my background in n...

On Thu, Nov 10, 2005 at 05:30:10PM +0100, oliver oli wrote: > John Koleszar wrote: > >I hadn't even heard > >of ambisonics until your post, to be honest. > > because people don't know how to distribute ambisonics. no way to play > it in a DVD player. there are no easy to use software players that > decode ambisonic files and there are no widely used audio

Did I see some code posted here that would create a graphical representation of a database relationships using the graphviz utilities? -- Posted via http://www.ruby-forum.com/.

I noticed that in as.data.frame.table, the stringsAsFactors argument defaults to TRUE, whereas in the other as.data.frame methods, it defaults to default.stringsAsFactors(). The documentation and implementation agree on this, so this is not a bug. However, I was wondering if this disparity was intended or if it might be some sort of unintentional oversight. If it is intentional, I wonder what

Hi, This msg for Chad Fowler or anyone who fits the subject line. I bought the Recipes book and really like the way it has been progressing. There is one subject I''d like to see explored in detail. Having come from Assembly and C background I find that a ''must have'' tool in your collection is the debugger. I find debugging a Rails App the most thorny issue inversely

Hello I have been using LAMP for the last 6 years and i am now finally making the choice to move over to RoR. This MVC stuff is all very new to me. As i have no trouble understanding ruby code... or any code for that matter.. my challange comes in getting my head around the MVC stuff. Is there any demos articles that you guys have seen that takes a site or a business breif and explains where