search for: technique

Hi R-users, My question is more methodological one, rather than technical. I have to samples representing residuals based on two measurements techniques (resid1,resid2; n=69). I need to compare two samples, to reject one technique (the worse one), and to keep the one which gave lower residuals (better one). What to look for? What should I analyse? Means, variance, std. deviations? Based on preliminary EDA: mean_resid1 < mean_resid2 #I woul...

Has anyone used the built in FAT (Fade Anything Technique) that exists in 0.11.1 of Rails? I could not find anything in the documentation so I was wondering if anyone has any code snippets on how they used it? Thanks for your help. John

...ng this when it goes full scale. Compatibility is a great seller--however, given that it's nearly impossible to get a refund on one of these so-called "broken" (not that I disagree...) CDs, what do we have to voice our disgust other than more elaborate ripping/protection circumvention techniques? > I'm not paranoid that the entire world is becoming corporate and all. I have > absolute faith that this "anti-pirating technique" will be broken quite > quickly and everything will return to business as usual. It'll be circumvented eventually, but that doesn't m...

Hi all, Could you please point me to good materials on various tricks/intuitions/techniques of regression, and hopefully in R? For example, what does lm(y~ x * w - 1) mean vs. lm(y ~ x/w -1 ) vs. lm (y ~ x:w-1), etc... I just found that even simple linear regression is not that simple and there are a lot of tricks/techniques in using them... Hopefully I can find good materials on thes...

Happy New Year ! XLSolutions February 2010 R courses schedule is now available online at 9 USA cities for with 13 new courses: *** Suggest a future course date/city (1) R-PLUS: A Point-and-Click Approach to R (2) S-PLUS / R : Programming Essentials. (3) R/S+ Fundamentals and Programming Techniques (4) R/S-PLUS Functions by Example. (5) S/R-PLUS Programming 3: Advanced Techniques and Efficiencies. (6) R/S+ System: Advanced Programming. (7) R/S-PLUS Graphics: Essentials. (8) R/S-PLUS Graphics for SAS Users (9) R/S-PLUS Graphical Techniques for Marketing Research. (10) Multivariate Statistical...

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Hi, I am not sure if this should go to r-help or r-dev list. I have looked at some archives of R libraries but cannot seem to see a project that focuses on the new matrix factorization techniques that are showing up in the literature. I have made a list of them: https://sites.google.com/site/igorcarron2/matrixfactorizations they include Robust PCA, Dictionnary Learning, Sparse PCA and are mostly implemented in Matlab. What is most interesting is that even though they share the same names...

I know of a few techniques for minimizing server bandwidth when bittorent is not an option. 1) If you have the beta isos, you can rename them as centos 5 isos and then rsync from a mirror that allows rsync (such as kernel.org). Then only changes from beta to centos 5 plus some overhead is downloaded. I suppose you could...

A subset of my raw data looks like this: -------------- "Grip" "Technique" "Baseline.integrated" "Task" "Stroke..direction." "Engag" "Disen" "PenDG" "PenUG" "PenDS" "PenUS" "Duration" ------------- &...

XLSolutions Corporation (www.xlsolutions-corp.com) is proud to announce a 2-day course: "R/S-plus Fundamentals and Programming Techniques". ****Boston, MA-----------------> March 13-14 Course Description: This two-day R/S-plus course focuses on a broad spectrum of topics, from reading raw data to a comparison of R and S. We will learn the essentials of data manipulation, graphical visualization and R/S-plus programmin...

XLSolutions Corporation is proud to announce our March 2007 R/S: Fundamentals and Programming Techniques - in Princeton March 1-2, 2007 : http://www.xlsolutions-corp.com/Rfund.htm This two-day beginner to intermediate R/S-plus course focuses on a broad spectrum of topics, from reading raw data to a comparison of R and S. We will learn the essentials of data manipulation, graphical visualization a...

Hello metafor users, I'm using metafor to perform a single-effect summary estimate of the raw proportion of patients experiencing a post-operative complication, and I'm interested in seeing if this proportion differs between the three most commonly used surgical techniques. The software is working as expected, but I would like to double check on the interpretation of my mixed-effect model summary. The levels of my moderator variable surgery.type are LateralWedge, Dome, and Complex, which I've dummy coded like this: dat$LateralWedge<-ifelse(dat$Technique...

...th success or failure or, if there's any relationship at all between the measures and the outcomes (success or failure). I don't have (as yet) any experience using clustering techniqes (in R or elsewhere) but thought that they might be applied in this situation. In general, are clustering techniques useful in this situation? Is any techniques better than another? And more specifically, can I use R to determine clustering characterics of the 12 measures and then, for each cluster, have R output whether the cluster is more associated with success or failure? Any help appreciated, Bill Vedder...

...indow, for example 20 time steps wide (everty step is equal to 50 fs). But this meaningless (on my view) because it would dig out a transient relationship. Whereas what we need is a relationship that lasts consistently all over the configurational transformation period. I made some progress with techniques for Dimensionality Reduction. The problem is that such techniques do not select variables. For instance, if I can reduce the dimensionality, say from 100 to 8, still I am not likely to be able to find the 8 independent variables which carry most of the information. Very likely the basis of the...

We've added 2 additional courses to our April Schedule: (++) R/S Fundamentals and Programming Techniques *** San Francisco / April 24-25, 2008 *** *** New York City / April 28-29, 2008 *** *** Seattle / April 21-22 Regards - Sue > -------- Original Message -------- > Subject: [BioC] XLSolutions 9 Courses: Upcoming March-April 2008 R/S+ > Course Schedule by XLSolutions Corp >...

...nd operating characteristics (especially physical implementation) it is not possible to coherently optimize complex code sequences, especially with wide varieties of influences on abstract operation. Obviously, all characteristics of physical system implmentation should be included in the standard techniques. More importantly, given most of that model data (result values) is fairly finite and known variable data ranges for most target implementations, one must propogate these analytics to higher models. There is no difference between the physics simulation techniques used to confirm the physical chi...

I am still trying to find some faster clustering technique for search result. One technique which strike to me is, using the Latent Semantic Indexing for Clustering the search result can give better results. In which we don't even need to iterate over different values of 'k'(in K-means algorithm) to cluster documents rather we can cluster whole...

Hello, I need to analyse a data matrix with dimensions of 30x100. Before analysing the data there is, however, a need to remove outliers from the data. I read quite a lot about outlier removal already and I think the most common technique for that seems to be Principal Component Analysis (PCA). However, I think that these technqiue is quite subjective. When is an outlier an outlier? I uploaded an example PCA plot here: http://s14.postimage.org/oknyya1ld/pca.png Should we treat the green and red dots as outliers already or only th...

...akes the database queries quite a bit more efficient. However, when you put conditions on an association like that, it is enforced globally and suddenly things like :dependent => :delete_all will only delete events from the future as well. I welcome feedback and potential gotchas in using this technique. I''m also especially interested in documentation on prior uses of this technique. I googled pretty extensively, but its hard to separate this particular use from a lot of other issues people are talking about. I have written a complete writeup on the thought process at: http://darwinwe...

Sorry Tom I''ll get flamed for this. Trying to set up squid parsed by dansguadian. I set in rules to redirect anything going to port80 from wlan0 to go 3128. What else to I need to add to say the start file to get the output from squid back into the iptables chain. Yes I''ve googled and now I''m tottaly confused TIA & HNY Richard