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Hello to everybody, Does anyone has implemented a function for evaluating models using windowing strategies, such as growing window or sliding window ones? The aim is to evaluate regression models on a time series data. I do not use cross-validation once data sorted in a radom way does not make sense when evaluating time series. Thanks Joao Moreira

Estimadísimo Carlos: Muchísimas gracias por responderme y hacerlo tan rápido. Contemplé esa posibilidad, es decir, que el hiperparámetro estuviera suponiendo un problema, y probé de esta forma: > learner <- lrn("classif.ranger", num.trees = 5, mtry = NULL) Error: Element with key 'classif.ranger' not found in DictionaryLearner! Pero obtuve el mismo error. Como muestro. Reconozco el error de imprecisión al plantear la duda, por no poner esta exp...

...ouple CentOS 4 servers (all up-to-date) that are having strange command failures. I first noticed this with a perl script that uses lots of system calls. Basically, sometimes a command just won't run: thoth(52) /tmp> ls thoth(53) /tmp> ls thoth(54) /tmp> ls thoth(55) /tmp> ls learner lost+found/ thoth(56) /tmp> ls learner lost+found/ thoth(57) /tmp> ls learner lost+found/ thoth(58) /tmp> ls learner lost+found/ thoth(59) /tmp> ls learner lost+found/ thoth(60) /tmp> ls learner lost+found/ thoth(61) /tmp> ls learner lost+found/ thoth(62) /tmp> ls...

...ribed in: http://bugs.digium.com/view.php?id=14241 I'm using asterisk-1.6.0.6, Bridge(), and I'm having a hangup context executed when the caller is still on the line. These channels are all SIP. ==== I want a group of expert callers who can dial in to the system, stay put, and let other learner callers come to them. In between the learner callers, I want them to hear hold music. : exten => 111,1,Goto(Expert_Gateway) exten => 222,1,Goto(Learners) [Expert_Gateway] exten => s,1,Answer exten => s,2,AGI(authenticate_and_register) exten => s,3,MusicOnHold() exten => s,4,Got...

...8 "1751",60682,5962,"sexta-feira ",58 "1749",61187,5705,"sexta-feira ",58 "1762",62973,4829,"sexta-feira ",58 2. Running the next code: data <- read.table('errorexample.txt', header=TRUE,sep=",",dec=".") learner <- 'ppr' learner.pars <- list(Duracao ~ ., nterms=1, data=data, kernel='supsmu', na.action=na.omit, max.terms=5, optlevel=1, sm.method='supsmu', bass=0, span=0) model <- do.call(learner, learner.pars) It works fine. 3. But running: data <- read.table('er...

...e clasificación. En concreto, para entender su funcionamiento he probado un ejemplo simple (viene en CRAN). Sin embargo, cuando cambio el parámetro de clasifiación en la función de aprendizaje, me aparece el error siguiente: *Error: Element with key 'classif.ranger' not found in DictionaryLearner!* La situación es la siguiente: library(ranger) library(mlr3) task_iris <- TaskClassif$new(id = "iris", backend = iris, target = "Species", positive = NULL) # l...

...a vector where the i:th and (i-1):th values of x are always summed. First value of the new vector has the same value as the first component of x. Use the created function to some vector x to show that the function works. -- View this message in context: http://r.789695.n4.nabble.com/Biologist-R-learner-tp4650044.html Sent from the R help mailing list archive at Nabble.com.

Hi Experts, As i am a new in this forum, let me introduce myself:- i am Debaranjan, from India, Assam. I have heard many things about R and its statistical Magic feature. i am really have nothing knowledge about R language nor have ever used before. i am only a nursery in R. please help me in learning R. I have gone through many study material for R but have gain nothing

DeaR ComRades, This is a quote from a News article in Science's 11-February issue, about competitions to model data: "For Chris Raimondi, a search-engine expert based in Baltimore, Maryland, and winner of the HIV-treatment competition, the Kaggle contest motivated him to hone his skills in a newly learned computer language called R, which he used to encode the winning data model.

I want to create a graph to express the idea of the area under a pdf curve, like http://r.789695.n4.nabble.com/file/n3032194/w7295e04.jpg Thank you for any help. ----- A R learner. -- View this message in context: http://r.789695.n4.nabble.com/How-to-plot-a-normal-distribution-curve-and-a-shaded-tail-with-alpha-tp3032194p3032194.html Sent from the R help mailing list archive at Nabble.com.

Hello, I have some trouble in achieving the desired parametrisation for the weka classifier functions, using the package RWeka. The problem is, that the functions result=classifier(formula, data, subset, na.action, control = Weka_control(mycontrol)) do not seem to be manipulated by the mycontrol- arguments Perhaps this should be resepected via the handlers- argument , but the

I''m a slow learner when it come to shortcuts and i got real tired looking up Textmate''s Rails snippets & commands in the context menu. So i fired up trusty OmniGraffle and quickly created a little Cheat Sheet for all default snippets/macros/commands in Textmate''s current Rails Bundle. Ce...

Dear list, I have a list, as follows : a <- 5 names(a) <- "a" b <- 9 names(b) <- "b" c <- 15 names(c) <- "c" x <- list("i" = a, "j" = b, "j" = c) I want to invert the list, like this : $a i 5 $b j k 9 15 I do not find a clean solution. Could anyone give me elegant ideas ? Thanks in advance, Carlos

Hi Sarah, I believe opt takes the bytecode file (.bc) not the human readable form, but i am just a learner... Sam. sarath chandra-5 wrote: > > Hi all, > > How to print the analysis results using 'opt' command? > > I tried using the below command for my *module.ll* file > > *opt -analyze -memdep module.ll* > * > * > But it's printing > > Printin...

I am a mature learner; 3 masters some doctoral work ? statistics for social sciences; psychological statistics ? worked in spss and sas 2005 ? 2006 now have forgotten ; relearning my question is this can I do everything in R and Python and SAS studio that I did in SPSS and the paid variation of SAS we used in doctoral s...

...to the user-interface where necessary. Please consult the manual and the list of CHANGES below. The package 'mboost' (Model-based Boosting) implements boosting for optimizing general risk functions utilizing component-wise (penalized) least squares estimates or regression trees as base-learners for fitting generalized linear, additive and interaction models to potentially high-dimensional data. A big variety of models can be investigated using 'mboost' including survival models, expectile regression models, ordinal regression models as well as standard models such as simple...

...to the user-interface where necessary. Please consult the manual and the list of CHANGES below. The package 'mboost' (Model-based Boosting) implements boosting for optimizing general risk functions utilizing component-wise (penalized) least squares estimates or regression trees as base-learners for fitting generalized linear, additive and interaction models to potentially high-dimensional data. A big variety of models can be investigated using 'mboost' including survival models, expectile regression models, ordinal regression models as well as standard models such as simple...

Thanks Henrik this is very helpful! I will try this out on our tests and see if gcDLLs() has a positive effect. mlr currently has tests broken down by learner type such as classification, regression, forecasting, clustering, etc.. There are 83 classifiers alone so even when loading and unloading across learner types we can still hit the MAX_NUM_DLLS error, meaning we'll have to break them down further (or maybe we can be clever with gcDLLs()?). I'...

Hi UseRs - I am new to R, and could use some help making out-of-sample predictions using a boosting model (the mboost command). The issue is complicated by the fact that I have panel data (time by country), and am estimating the model separately for each country. FYI, this is monthly data and I have 1986m1 - 2009m12 for 9 countries. To give you a flavor of what I am doing, here is a simple

Dear R-help members. I am an 'R-learner' (about 6 hours so far) using the lattice library to create a ranked dotplot and am colour coding the dots by a variable called "Commodity". However when i use autokey to make a legend the size (cex) and symbol (pch) do not match what is on the dotplot. Code is below and image atta...