search for: siangli

Can I say that RPART is a modified algo of CART and PARTY a modified of CHAID? Thanks. ---- Chua Siang Li Consultant - Operations Research Acceval Pte Ltd Tel: 6297 8740 Email: siang.li.chua at acceval-intl.com Website: www.acceval-intl.com This message and any attachments (the "message"...{{dropped:12}}

Hello there. I have fitted a rpart model. > rpartModel <- rpart(y~., data=data.frame(y=y,x=x),method="class", ....) and can use rpart$where to find out the terminal nodes that each observations belongs. Now, I have a set of new data and used predict.rpart which seems to give only the predicted value with no information similar to rpart$where. May I know how

Hello there. Is there any function in R that can do cluster on a set of data that has both categorical and numerical variables? thanks. siangli

Hello there. I uses the following codes for the purpose of variable selection. > lmModel <- lm(y~.,data.frame(y=y, x=x)) > step <- stepAIC(lmModel, direction="both") > step$anova Stepwise Model Path Analysis of Deviance Table Initial Model: y ~ x.Market.Price + x.Quantity + x.Country + x.Incoterm + x.Channel + x.PaymentTerm Final

Hi. I uses rpart to build a regression tree. Y is continuous. Now, I try to predict on a new set of data. In the new set of data, one of my x (call Incoterm, a factor) has a new level. I wonder why the error below appears as the guide says "For factor predictors, if an observation contains a level not used to grow the tree, it is left at the deepest possible node and

Hi. I need some advises on how to use R to find pi (i is the index) with the following objective function and constraint: max (sum i)[ f(ai, bi, pi) * g(ci, di, pi) * Di ] s.t. (sum i)[ f(ai, bi, pi) * Di * pi] / (sum i)[ f(ai, bi, pi) * Di ] <= constant f and g are diffentiable. So, I am thinking of optim with method = "BFGS"? But wonder how to include the

hi i have switch to using oddcast under window platform and now using icecastwin32 as server in this case is there any possible way to let icecastwin32 to stream Wma? pls advise thanks you -----Original Message----- From: Geoff Shang [mailto:geoff@hitsandpieces.net] Sent: Wednesday, February 08, 2006 1:06 PM To: Neo Jiun Siang - R&D Cc: icecast@xiph.org; njsalan@hotmail.com Subject: RE:

...Q2. Now, say I am forecasting for next month Nov 2008. But I yet to have Nov 08 data for the 2 independent variables In fact currently, I only have Sep 2008 values. I think the parameter transfer is the solution? Would appreciate someone can shed some light on how I can proceed. Many Thanks. siangli

thanks alot Geoff by the way is there any possible ways to add plug-in to icecast2 server to stream Wma? regardless of the license problem -----Original Message----- From: Geoff Shang [mailto:geoff@hitsandpieces.net] Sent: Tuesday, February 07, 2006 8:08 PM To: Neo Jiun Siang - R&D Cc: icecast@xiph.org; njsalan@hotmail.com Subject: RE: [Icecast] guideline for plug-in to icecast2 server Neo

...id in the R function? (I don't want random starting pt) 2) how to determine the optimal (if not, a good) centroid to start with? (I am not after the fixed seed solution as it only ensure that the cluster is the same at every run but not necessary a good cluster.) Many Thanks. siangli

hi actually im trying to add feature to ices2 to able to stream mix file format such as ogg and mp3 in the same playlist.m3u without extra decoding and encoding that function like ezstream. the reason i dont want to use ezstream as source client becoz after going thru decoding and encoding, the audio quality drops. Therefore im trying to find out is there any easy way out to add plug-in to

Dear R-helpers. Would appreciate if someone can explain the warning messages below, after auto.arima. I couldn't find any clue in the archived help. Also, how do I retrieve the AICs of each tried model in auto.arima? The purposes are (1) to output to a text file, and (2) to find the 2nd best model by finding 2nd lowest AIC instead of eyeballing thru the value at the console

hi all i would like to find out is that any ways to add plugin to icecast2 and ice2 to stream mp3 .Is there a list of gulidline for adding feature to present icecast2 and ices2. i will a appretiated for the help from icecast memeber and developer thank you .

I've just recently converted my Windows pc to Mandrake Linux & I've got everything I need working except for this software - Equis Metastock. I've managed to install it. However, on execution, it dies with the following msg: "A CreateFont error occurred while loading the Symbols font: C:\Program Files\Equis\MetaStock\equis.ttf". On the wine console, the following msg