similar to: Automatic Pluar to Singluar derivation in Loops

Wenyaun Xi <xi@keynes.econ.utah.edu> writes to S-news: > I ran into some problems when I tried to get symbolic derivation by > using a function deriv3(). The expression contains 18 > parameters, of which I want to have an information matrix eventually. I > ran it on my 200MHz Pentium PC with 64meg RAM. Each time I kick out the > job, the S-plus 3.1 for Windows stops after

Hello, I don't understand the description / help-text for the numericDeriv() function. Why is there a new environment used? And what is meant with an environment here? Is it similar or the same as a local workspace, like an environment in functional languages? And why is it needed here? numericDeriv could just calculate the difference bewtween two values and divide this difference by the

All, I whipped up a small extension for Prototype to solve some modeling issues I was having on a large JS project. I know there have been serveral alternative "write JS in Ruby" type efforts, including ruby.js, rb2js, and prototype.js itself, but I was hoping to keep it as light as possible while gaining the most powerful aspects of derivation/mixins/callbacks. Much like the prototype

Dear all, I am using the function 'D' in the 'stats' package to perform symbolic derivation. This works very well and it is much faster than e.g. Mathematica (at least for my purposes). First, I would like to thank the development team for this excellent function. However, I run into trouble in some cases, particularly when I am to do some operations on long expressions

Leroy Tennison wrote: > No kidding, but in that "other OS" the answer to the question "how can I > create that report" is usually "You can't unless you spend money for a > third-party application". > "Other", singluar? Did you mean WinDoze, or on an IBM mainframe, or...? mark "been around the block" > ----- Original

If I understand things correctly, by default, Rails expects both the ActiveRecord class name and the model name (i.e., the name of the file that contains the definition of the ActiveRecord class) to be the singluar of the table name. How can I override this default behavior with respect to the model name? That is, I would like to have the file name of the file that contains the definition of the

Dear R list users, the singluar value decomposition of a symmetric matrix M is UDV^(T), where U = V. La.svd(M) gives as output three elements: the diagonal of D and the two orthogonal matrices u and vt (which is already the transpose of v). I noticed that the transpose of vt is not exactly u. Why is that? thank you for your attention and your help Stefano AVVISO IMPORTANTE: Questo messaggio di

Sorry for asking this but I am keen to get on and build an app based on RoR and have had a look around at FAQa and the like with no immediate sucess. What I am looking for is an explainantion of the rules/requirements for table/index/coulumn names with RoR. RoR appears to have a set of expected naming conventions which it would appear you can over ride but it would seems a hell of a lot

Warren Young wrote: > On Oct 25, 2017, at 11:00 AM, Leroy Tennison <leroy at datavoiceint.com> > wrote: >> >> Although "not my question", thanks, I learned a lot about array >> processing from your example. > > Yeah, it?s amazing how many obscure corners of the Bash language must be > tapped to solve such a simple problem. I count 7 features in

Hi, I''m wondering how I should go about making my website multi-lingual. Basically, there will be different content for the different languages, and that''s not really a problem... all I need to do is give each content entry in the database a language_id. But the problem is with the non-content text, eg, "In order to access this area, you must be logged in",

I''m completely new to Ruby and Rails and could use some help resolving an issue. I have a list method that is supposed to show the titles and states(status) of requests, but I get an error from this piece of code: <td><%= change.states.state %></td> The error is: c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:100:in

Hello - I wanted to announce a very large web application that was built with Ruby on Rails and runs the site Gusto! http://www.gusto.com/ . It was deployed yesterday in a little over 4 months of development with 3 developers. The origins of the site were being developed in Java using Hibernate + Tapestry and the decision was made to port the 100+ table model to Rails to see if there were

Can anyone verify that Ferret should work correctly on 64 bit Red Hat ES 4? The test suite gets the following segfault: ........................../unit/../unit/analysis/../../unit/index/../../unit/store/../../unit/search/tc_filter.rb:20: [BUG] Segmentation fault ruby 1.8.4 (2005-12-24) [x86_64-linux] This is with version "ferret-0.9.4" on an AMD Dual Opteron 270. -- Posted via

Hello, The problem I am having is I have a form where a user can edit their data that does not include their password. I have another form that I allow them to change their password. Both forms use the before_update method that hashes the password. There is no password in the first form. Am I making this too complicated? How do I call the hash_password for only the second form? Both forms use

I''m trying to use new_equipment_path, which creates the appropriate link. But, when trying to evaluate "equipment/new" I get the error below. I''ve included my routes (rake route). Equipment is one of those words that pluralizes to "equipment", so the singular is right (from what I know from this forum. Any help would be appreciated. Error: equipment_url

Here''s a question for those well-versed in rforum or engines -- or both, ideally :) I''ve spent some time today turning RForum into an engine, using rails 1.0, engines trunk, and rforum 0.1 (as rforum trunk didn''t appear to work out of the box). My rforum engine works, but only when I do two things that I found by trial and error: 1) All rforum controllers subclass

Hi, I have about half million binary features, and would like to find a model to estimate the continous response. According to the inference, I can express predictors and response by linear model. (ie. Design matrix: large sparse matrix with 0/1. Response: Continous number) Since it is not a classification problem, someone suggested me to try random forest in R. However, in the randomForest help

I have been google for a few days now trying to get the Citrix PV Drivers to work on a server 2008 R2 HVM guest. I get the machine up and running then I install the cirtix PV drivers. I have tried both making and not making the registry change. Once I reboot the server I get stuck at the boot screen. The xen log says: XENUTIL: WARNING: CloseFrontend: timed out in