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...=700 but thousands and thousands of them. I am designing a simulation in R and running those regressions and R itself is way too slow. So, I am thinking of compiling the regression run itself in Fortran and Java and then calling it from R. Thank you very much for any advice! Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...I most effectively transform X into a data frame with columns a, b, and c? I would love to find a generic solution, and not a specific solution like this one: frame<-rbind(X[[1]],X[[2]],X[[3]]) ...because in reality I have a lot of elements of X. Thank you very much! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...unction it does not find the rpart specific functions and gives me an error. How can I make a new function that is a small modification of an existing package function and let the modified function access the hidden package functions? Michael Conklin Chief Methodolgist - Advanced Analytics MarketTools, Inc. 6465 Wayzata Blvd. Suite 170 Minneapolis, MN 55426 Tel: 952.417.4719 | Mobile:612.201.8978 Michael.Conklin@markettools.com <mailto:Michael.Conklin@markettools.com> MarketTools(r) http://www.markettools.com <http://www.markettools.com/> This e-mail and any attachm...

...tracting links from pages but I cannot seem to find a way to extract the text. Any help would be greatly appreciated - I will not know the structure of the URLs I would submit in advance. Any suggestions on where to look would be greatly appreciated. Mike W. Michael Conklin Chief Methodologist MarketTools, Inc. | www.markettools.com<http://www.markettools.com> 6465 Wayzata Blvd | Suite 170 | St. Louis Park, MN 55426. PHONE: 952.417.4719 | CELL: 612.201.8978 This email and attachment(s) may contain confidential and/or proprietary information and is intended only for the intended addressee(s)...

...t; the default tick marks and introduce those tick marks in specific locations. For example, currently in my X axis tick marks are (automatically) at 10, 11, 12, 13 but I want them to be in 5 specific locations, like 9.89, 10.34, etc. Any hint would be greatly appreciated! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...each of the 4 branches produced by this would split on "c" etc. In the leaves I just want to display the count. (The display part is not a problem, just the construction of the nested list. Any help is much appreciated. Michael Conklin Chief Methodologist - Advanced Analytics MarketTools, Inc. 6465 Wayzata Blvd. Suite 170 Minneapolis, MN 55426 Tel: 952.417.4719 | Mobile:612.201.8978 Michael.Conklin@markettools.com <mailto:Michael.Conklin@markettools.com> MarketTools(r) http://www.markettools.com <http://www.markettools.com/> This e-mail and any attachm...

...Does anyone know what might be causing this? My dataset has 2250 cases. I am using R version 2.4.0 (2006-10-03) Copyright (C) 2006 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform - Windows XP sp2 Michael Conklin Chief Methodologist - Advanced Analytics MarketTools, Inc. 6465 Wayzata Blvd. Suite 170 Minneapolis, MN 55426 Tel: 952.417.4719 | Mobile:612.201.8978 Michael.Conklin@markettools.com <mailto:Michael.Conklin@markettools.com> MarketTools(r) http://www.markettools.com <http://www.markettools.com/> This e-mail and any attachm...

...recommended on the Bioconductor site but basically R cannot seem to find the needed dll files. So, even though I have added the appropriate directories to the system path R cannot seem to find them. Any tips would be appreciated. W. Michael Conklin Chief Methodologist Google Voice: (612) 56STATS MarketTools, Inc. | www.markettools.com<http://www.markettools.com> 6465 Wayzata Blvd | Suite 170 | St. Louis Park, MN 55426. PHONE: 952.417.4719 | CELL: 612.201.8978 This email and attachment(s) may contain confidential and/or proprietary information and is intended only for the intended addressee(s)...

...bunch of empty graphs - the graph frame but no data). So it appears that when I evaluate the expression to see if it is a trellis graph it no longer correctly evaluates at the end of the function. Any advice would be most welcome. Michael Conklin Chief Methodologist - Advanced Analytics MarketTools, Inc. 6465 Wayzata Blvd. Suite 170 Minneapolis, MN 55426 Tel: 952.417.4719 | Mobile:612.201.8978 Michael.Conklin@markettools.com <mailto:Michael.Conklin@markettools.com> MarketTools(r) http://www.markettools.com <http://www.markettools.com/> This e-mail and any attachm...

...a$x<-as.character(a$x) a$y<-as.character(a$y) a$equal<-NA for(i in 1:nrow(a)) {a[i,3]<-a[i,1] %in% a[i,2]} I was wondering if one can do it faster, without doing it row-by-row as I did it. Maybe there is a faster way to compare 2 columns? Thank you very much! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...s (non R related) and have in the past have had issues with R crashes and would really like a system that does not require me to remember to hit the save button on my script every 10 minutes so that I can avoid redoing everything. W. Michael Conklin Chief Methodologist Google Voice: (612) 56STATS MarketTools, Inc. | www.markettools.com 6465 Wayzata Blvd | Suite 170 |? St. Louis Park, MN 55426. ?PHONE: 952.417.4719 | CELL: 612.201.8978 ?? This email and attachment(s) may contain confidential and/or proprietary information and is intended only for the intended addressee(s) or its authorized agent(s). An...

...h_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] randomForest_4.5-30 > Any ideas would be greatly appreciated. W. Michael Conklin Chief Methodologist MarketTools, Inc. | www.markettools.com<http://www.markettools.com> 6465 Wayzata Blvd | Suite 170 | St. Louis Park, MN 55426. PHONE: 952.417.4719 | CELL: 612.201.8978 This email and attachment(s) may contain confidential and/or proprietary information and is intended only for the intended addressee(s)...

...a, xlev = object$xlevels) : variable lengths differ (found for 'Price') In addition: Warning message: 'newdata' had 25 rows but variable(s) found have 43350 rows Does anyone have an idea what is going on? Best regards, Michael Conklin W. Michael Conklin Chief Methodologist MarketTools, Inc. | www.markettools.com<http://www.markettools.com> 6465 Wayzata Blvd | Suite 170 | St. Louis Park, MN 55426. PHONE: 952.417.4719 | CELL: 612.201.8978 This email and attachment(s) may contain confidential and/or proprietary information and is intended only for the intended addressee(s)...

...ab="Text for X axis", col=PrimaryColors[3]) It works just fine. Question: Where how can I change such things as font size for X axis label (below the numbers), font size for Title, value labels (to label bars with actual numbers), add grids, etc.? Thanks a lot! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...together, and all C dummy variables together - when other predictors are present (in other words, the sum of squared semi-partial correlations for all A dummy variables, B dummy variables, and C dummy variables)? Or is it just not possible with lm? Thank you very much! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...wondering if those of you who have experience with it could recommend an R package. I found the following R packages: Rglpk glpk lpSolve lpSolveAPI Are there any others? Are some of them easier to use than others for a beginner? Any advice would be greatly appreciated! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...ow exactly R^2 is calculated? Is "mse" mean squared error for prediction? Is "mse" an average of mse's for all trees run on out-of-bag holdout samples? In other words - is this R^2 based on out-of-bag samples? Thank you very much for clarification! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...So, I was wondering if it is at all possible to: 1. Create gridlines in an interaction.plot 2. Define the font type of the legend title (e.g., regular vs. bold as in font=2) 3. Put actual values (on Y) next to each point in the graph. Thank you so much for your advice! -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...adj=c(-0.2,1)) }) print(plot) win.metafile(file="test.emf") print(plot) dev.off() postscript(file="test.ps") print(plot) dev.off() png(file="test.png") print(plot) dev.off() tiff(file="test.tiff") print(plot) dev.off() -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com

...ulate mean squared deviation of observed y minus predicted y for (a) the untouched oob dataset and for (b) the predictor-P1-permuted oob dataset. Subtract (a) from (b). 3. The average of this number over all trees in the forest is the raw importance score for predictor P1. -- Dimitri Liakhovitski MarketTools, Inc. Dimitri.Liakhovitski at markettools.com