Re: [R] Decision Tree and Random Forrest

I still need the output to match my requiremnt in my original post. With decision rules "clusters" and probability attached to them. The examples are sort of similar. You just provided links to general info about trees. Sent from my Verizon, Samsung Galaxy smartphone Original

Re: [R] Decision Tree and Random Forrest

On Wednesday, April 13, 2016, Michael Artz wrote: > Tjats great that you are familiar and thanks for responding. Have you > ever done what I am referring to? I have alteady spent time going through > links and tutorials about decision trees and random forrests and have

Re: [R] Decision Tree and Random Forrest

Tjats great that you are familiar and thanks for responding. Have you ever done what I am referring to? I have alteady spent time going through links and tutorials about decision trees and random forrests and have even used them both before. Mike On Apr 13, 2016 5:32 PM, "Sarah Goslee"

Re: [R] Decision Tree and Random Forrest

It sounds like you want classification or regression trees. rpart does exactly what you describe. Here's an overview: http://www.statmethods.net/advstats/cart.html But there are a lot of other ways to do the same thing in R, for instance:

Re: [R] Decision Tree and Random Forrest

Ah yes I will have to use the predict function. But the predict function will not get me there really. If I can take the example that I have a model predicting whether or not I will play golf (this is the dependent value), and there are three independent variables Humidity(High, Medium, Low),

Re: [R-es] R igraph

Estimados Hace unos días por sugerencia de Luisfo Chiroque, utilicé esta opción: datos.simple <- simplify(udatos, edge.attr.comb = list(weight="sum”)) Se me ocurrió mirar el “weight” para conocer cuándo daba la suma, para hacerlo fácil dentro de un data.frame de la siguiente forma:

Re: [R] Decision Tree and Random Forrest

I think you are missing the point of random forests. But if you just want to predict using the forest, there is a predict() method that you can use. Other than that, I certainly don't understand what you mean. Maybe someone else might. Cheers, Bert Bert Gunter "The trouble with having an open

Re: [R] Decision Tree and Random Forrest

Also that being said, just because random forest are not the same thing as decision trees does not mean that you can't get decision rules from random forest. On Wed, Apr 13, 2016 at 4:11 PM, Michael Artz wrote: > Ok is there a way to do it with decision tree? I just

Re: [R] Decision Tree and Random Forrest

Ok is there a way to do it with decision tree? I just need to make the decision rules. Perhaps I can pick one of the trees used with Random Forrest. I am somewhat familiar already with Random Forrest with respective to bagging and feature sampling and getting the mode from the leaf nodes and it

Re: [R] Decision Tree and Random Forrest

Nope. Random forests are not decision trees -- they are ensembles (forests) of trees. You need to go back and read up on them so you understand how they work. The Hastie/Tibshirani/Friedman "The Elements of Statistical Learning" has a nice explanation, but I'm sure there are lots of good web

Re: [R] reduced set of alternatives in package mlogit

To back up Ber's please have a look at http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example and/or http://adv-r.had.co.nz/Reproducibility.html John Kane Kingston ON Canada > -Original Message- > From: jose.ferr...@logiteng.com > Sent: Wed, 13 Apr 2016

[R] Decision Tree and Random Forrest

Hi I'm trying to get the top decision rules from a decision tree. Eventually I will like to do this with R and Random Forrest. There has to be a way to output the decsion rules of each leaf node in an easily readable way. I am looking at the randomforrest and rpart packages and I dont see

[R] on the output of constrOptim()

Dear list, The following example of constrOptim() where the initial point is the solution shows that the component counts is not a two-element vector as documented in the man page. constrOptim(c(1,1), fr, grr, ui = diag(2), ci = c(0,0)) Does anyone have the same behavior? A possible

Re: [R] reduced set of alternatives in package mlogit

code? example data? We can only guess based on your vague post. "PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code." Moreover, this sounds like a statistical question, not a question about R

Re: [R-es] R y Excel - paquete openxlsx

Muchas gracias Isidro, para mi es de interes Un saludo From: ihida...@jccm.es To: r-help-es@r-project.org Date: Wed, 13 Apr 2016 16:58:36 +0200 Subject: [R-es] R y Excel - paquete openxlsx Buenas tardes. Alguna vez alguien ha preguntado por aqu� acerca de la conexi�n entre R y Excel, y he

Re: [R] formula argument evaluation

%=>% would have precendence ('order of operations') problems also. A + B %=>% C is equivalent to A + ( B %=>% C) and I don't think that is what you want. as.list(quote(A + B %=>% C)) shows the first branch in the parse tree. The following function, str.language, shows the entire parse

[R-es] R y Excel - paquete openxlsx

Buenas tardes. Alguna vez alguien ha preguntado por aqu� acerca de la conexi�n entre R y Excel, y he recomendado el paquete "XLConnect". Bien, este mail es para recomendar el paquete "openxlsx" en su lugar. "XLConnect" est� basado en java y, cuando he tenido que trabajar con vol�menes de

Re: [R] R 3.2.4-revised is released

CRAN turned out to have structural issues with version numbers that are not of the x.y.z variety (some script break). I'm trying to find time to build a 3.2.5 just to fix this up. Of course all standard procedures are broken as 3.3.0 is now in progress, so several things now need to be done

Re: [R] No color in plotting

Hi Without some reproducible example you hardly get any answer. if this works library(ggplot2) p <- ggplot(mtcars, aes(wt, mpg)) p + geom_point() the problem is in your data. If it does not, the problem is elsewhere, including broken R installation. Cheers Petr > -Original Message- >

Re: [R] R 3.2.4-revised is released

My CRAN mirror still says this: The latest release (Thursday 2016-03-10, Very Secure Dishes) R-3.2.4.tar.gz, read what's new in the latest version. Should that not be updated? Anyone who has not seen that post won't know to look further. On Wed, 16-Mar-2016 at 08:39PM +, Peter

Re: [R] formula argument evaluation

I suppose it would work, although "=>" is rather a descriptive symbol and less a function. But choosing between quoting: "A + B => C" and a regular function: A + B %=>% C probably quoting is the most straightforward, as the result of the foo() function has to be a string anyways (which is parsed

[R] could not find function in mempry inside foreach loop

I'm trying to use foreach function to do multicore computing in R. Error in FUN(train_adjmt, iter = missedmat[i, 1], iter2 = missedmat[i, : task 1 failed - "找不到对象'predictMatrix'" then I call function A in the console. The problem is I'm calling a function Posdef inside B that is defined in

[R] could not find function in mempry inside foreach loop

I'm trying to use foreach function to do multicore computing in R. A <-function() { foreach(i=1:10) %dopar% { B() }} then I call function A in the console. The problem is I'm calling a function ipredictMatrix inside B that is defined in another script file which I source.However

[R] No color in plotting

Hi I am having a problem with plot () and ggplot (). When I call one of these functions, the plotting area starts to look as though it is working, but nothijg ever is visible. Unless it was a dendrogram. Woth the bar chart, the plotting area just had an x and y axis and nothing else. I tried a

Re: [R] RWeka Error

Hi,When I use any function of RWeka Package in Rstudio I get an error, "Error in .jnew (name): java.lang.ClassFormatError." can anyone guide me in this?Operation system used: Linux 64 bit (CentOS) Command used: >data("crude")>tdm <- TermDocumentMatrix(crude, control=list(tokenize =