search for: torgo

...esting enough this problem does not occur with the same option on the postscript() driver as it can be observed by running: > postscript('exp.eps',colormodel='gray') > barplot(table(subset(iris,Petal.Width>1)$Species)) > dev.off() Any help is most appreciated. Luis Torgo -- Luis Torgo FEP/LIAAD - INESC Porto, LA Phone : (+351) 22 339 20 93 University of Porto Fax : (+351) 22 339 20 99 R. de Ceuta, 118, 6o email : ltorgo at liaad.up.pt 4050-190 PORTO - PORTUGAL WWW : http://www.liaad.up.pt/~ltorgo

...efficient way (i.e. without a for loop). For instance, if x[0] = 100 and v = c(0.2,-0.1,0.05) then I would get x = c(120,108,113.4) I'm almost sure the function filter() from package tseries is the key for getting these values but I'm really blocked. Any help is much appreciated. Lu伱伃s Torgo -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 339 20 93 Machine Learning Group Fax : (+351) 22 339 20 99 R. de Ceuta, 118, 6o email : ltorgo at liacc.up.pt 4050-190 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

...') > m [,1] 20040813 1 20040814 2 > its(structure(m)) 1 20040812 1 20040813 2 -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Berton Gunter Sent: Wednesday, April 27, 2005 1:28 PM To: ltorgo at liacc.up.pt Cc: r-help at stat.math.ethz.ch Subject: RE: [R] Recursive calculation of a series of values Algebra: cumprod(1+v)*x[0] -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA "The business of the statistician is to catalyze the scientific learning process....

Is there any package similar to the XML package that is able to "extract" relevant information from HTML files. Namely, I'm interested in obtained data that is represented as a HTML table, into some R-type structure. Thank you. -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-.-.-.-.-.-.-.-.-...

Deall all, We need to perform a statistical analysis of a large database (40,000 entries with approximately 500 fields in each entry) currently handled in Oracle. The data contains categorical variables only. At the current stage we suggest classification and clustering analysis. We are planning to perform the analysis in R and would be very grateful for any

...This causes no problem with uniform scales, but generates that error when trying to guess the best scale for each panel. I think that it should be easy to add some test to the code obtaining the scales for each panel, to avoid the always unpleasant criptographic error messages ;-) Thanks, Luis Torgo -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

...dn't have R working with the pt_PT.utf-8 locale, I've installed the PT language support package for my OS, expecting that this would solve the "problem". Apparently I'm missing something else, so I wonder if someone could give me a hint on how to solve this. Thanks, Luis Torgo -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 339 20 93 Machine Learning Group Fax : (+351) 22 339 20 99 R. de Ceuta, 118, 6o email : ltorgo at liacc.up.pt 4050-190 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

Dear all, I'm looking for some material on data mining with R. I have something from Luis Torgo but I'd like to see something else. If anybody could help me I'll be thankful Adri??n

...problem: > Sys.setlocale("LC_TIME", locale="USA") [1] "English_United States.1252" However, I get the following error : > k <- "25-Sep-01" > strptime(k,"%d-%b-%y") [1] "NA" Thank you in advance for any help with this, Luis Torgo -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-....

...linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 6.1 year 2002 month 11 day 01 language R Thank you for any hints. -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

...t;confirmed" by the fact that if I use the function without cluster centers, simply given the number of clusters, I get the same solution: > kmeans(data,2,1) $cluster [1] 2 2 2 2 1 1 $centers [,1] [,2] 1 8.000 2.50 2 0.875 2.25 $withinss [1] 6.5000 32.9375 $size [1] 2 4 -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

...-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 5.1 year 2002 month 06 day 17 language R Thanks for any help, luis -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-.-.-.-.-.-.-.-.-.-...

...left corner of each of the panels I get. I've tried fixed values for the "x", "y" parameters of "ltext", but as I'm using different X scales for each panel things get messy... I'm using R 1.4.1 on a Windows 2000 machine. Thank you in advance. -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-.-.-.-.-.-.-.-.-.-....

I'm reading Torgo (2010) *Data Mining with R*<http://www.liaad.up.pt/~ltorgo/DataMiningWithR/code.html>in preparation for a class I'll be teaching next quarter. Here's an example that is very non-functional. > pH <- c(4.5,7,7.3,8.2,6.3) > names(pH) <- c('area1','area2',...

...ason for calling make.db.names with this value of parameter allow.keywords. In resume, my question is: Is there any reason for this that I am missing, or the change I've done is pretty safe and could possibly be done in future versions of the package? Thank you for any help. Luis -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

...As you can see the problem occurs with ? and ?, and not with the other accented characters. In Ess: > d2 <- data.frame(??????????????=c(34,45),name=c('xyz','fgd')) > d2 ?????????????? name 1 34 xyz 2 45 fgd Thank you for any help. -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-.-.-.-.-.-.-.-.-.-...

...instead of what the function does that is finding the minimum value and then stacking all bars from this minimum value up. I've looked into the the help pages and I saw no way to go around this behaviour. Is there an easy way to get these "negative" bars? Thanks, Luis -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo

This is the same bug as that reported by Wolfram Fischer a few days back. I'm working on it, and hopefully it would be fixed by the next release of lattice (sometime next week). Deepayan On Friday 13 December 2002 08:57 am, Luis Torgo wrote: > I've come across the following error when using free scales with bwplot (I > use > > a small example data set just to illustrate the problem): > > d <- data.frame( > > x=c(34.4, 12.4, NA, 65.3, NA, 12.0, 45.0, 645.0, 644.0,323.0), > fac1=c('a','...

...t; way of thinking on the quotes (which is date-based) into the indexing schema of time series objects, which by looking at the code of "get.hist.quote" is based on the conversion into the number of days (using "julian") from an origin. Thank you for any help. Luis -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo -.-.-.-.-.-.-.-.-.-.-.-.-....

...; I check the mailing list for solutions but I did not find anything, although I've noticed a similar problem report but for R1.6.0 (although there was no answer to this other message that I could try to transpose to my problem). Any help on solving this problem is welcome. Thank you, Luis Torgo -- Luis Torgo FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30 Machine Learning Group Fax : (+351) 22 600 36 54 R. Campo Alegre, 823 email : ltorgo at liacc.up.pt 4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo