similar to: Regression tree

Hello. I have a hudge problem, don't know how to deal with it... I'm supposed to implement a tree structure in R, without using rpart library... I don't have any clue about appropriate approach... Anyway, I can't use pointers under R...so how to to it? lists, vectors... Anyway, does anybody knows how the regression tree in rpart was implemented... Someone please help! Thanks, ana

Hi. I'm a real newbie in R, so I don't know how to apply, a function created by myself... prediction<-function(a,b) { .. } to a vector... It doesn't seem to understand lapply(vector, prediction())... Anyone can help me? Thanks in advance, ana

Hey, R-listers I was recommended to try using smooth.spline function for estimating 2-Dimensinal curve given a data set. So will you please tell me where to get this R function? Or which package provides this function? Thanks for your point. Fred

Hallo, can someone please help me. I have a proplem reading a file with more that one rows. e.g I used the function: p<-read.table(file="FILENAME ", header=TRUE,sep=";") and later used the data.Frame() function. It functions when the file has only a row of variables. When I insert the second row I get an error message. How do I do this ===== ===================== Sylvie

Hi, If I have: foo <- survfit(y ~ x) where y is a survival object and x is a n-level factor. The documentation says when I plot(foo), the confidence intervals will not be plotted (which I guess is understandable as otherwise the plot will get really messy). I tried to plot with confidence intervals by using: plot(foo, conf.int = TRUE) and indeed the resulting plot is messy. However

Hello helpers I have this problem. When I plot a regression tree, some words are cutted in the figure. There is an attached file tree.ps to see what I'm saying. In the right figure some labels are cutted. How can I solve this problem? -- http://adsl.sapo.pt -------------- next part -------------- A non-text attachment was scrubbed... Name: tree.ps Type: application/postscript Size: 4743

Hi, I have a column in a dataframe in the form of: > as.vector(SLDATX[1:20]) [1] "1/6/1986" "1/17/1986" "2/2/1986" "2/4/1986" "2/4/1986" [6] "2/21/1986" "3/6/1986" "3/25/1986" "4/6/1986" "4/10/1986" [11] "4/23/1986" "4/30/1986" "5/8/1986"

Hi, I'm not sure if this can be done but.. I know that with ifelse() I can do something like: ifelse(x <= 3, 1, 2) to go through each element in my vector x, and if x_i <= 3 substitute the number with 1 else with 2. Essentially I'll get a vector with 2 levels. Can I tweak it so I can get 3-levels? For example: if(x <= 3) then 1 elseif(3 < x <= 4) then 2

Hi, I have a function foo(x,y) and a dataframe, DF, comprised of two vectors, x & w, as follows : x w 1 1 1 2 2 1 3 3 1 4 4 1 etc I would like to apply the function foo to each 'pair' within DF e.g foo(1,1), foo(2,1), foo(3,1) etc I have tried >apply(DF,foo) >apply(DF[,],foo) >apply(DF[DF$x,DF$w],foo) However, none of the above worked. Can anyone help ?

Hi, I have a very simple question. If a want to save a whole program (say more than 5 command lines), how can I proceed without each time using the command history (that allow me to recall previously saved command, but which is to long if you want to recall more than 5 command lines), or without saving to a text file and use copy/paste when I open a new R session (but in fact this doesn't

Hi, I'm doing a presentation on Neural Networks and Tree-Based Models in two weeks, at the moment I'm looking for a data set to use in the presentation. What I would like to use is a good old data, like the Iris data, that is already known by every statisticians. MASS4 uses the cpus data in Chapter 8.10 and the Cushing's syndrome in Chapter 12.4. These two data sets plus the

Dear all, I am thinking of writing my own functions in s-plus (or in R). I just know how to work with S-plus / R built-in functions. Therefore, I'm a beginner in S programming. I am looking for some on-line documentation that is well written about "Programming in S language" where control stuctures / loops / vectorization and necessery sequences of S programming are

Hi, Suppose I have: # Fit a base model d1.ph <- coxph(Surv(start, stop, event)~ ejec + diavol + score + smoking + beta + surg.done, data = data.frame(foo)) summary(update(d1.ph, . ~ . + td1)) summary(update(d1.ph, . ~ . + td2)) As I have many columns in my data frame, foo, called td's. e.g. td1, td2, td3, .... And I'd like to

Dear helper. I am a beginer. I have difficulties to handle axis. I want to draw axis label such that axis has range of [-0.4,0.4] with intervel 0.2 for x and y axis. Some part of range do not have data points. Thus, plot does not show whole range. How can I enforce plot to depict the whole range regardless of existence of data points ? Another problem is that when I depict axis labels, some

Hola! I am now downloading r-devel to compile it on windows XP. The CRAN source code page says "you will prefere to use rsync". I am googling around, and cannot find anything about rsync on windows. Anybody has any experience with rsync on windows? Kjetil

Hi, While I was searching the web to see who I can look for to help me with the R program, I came across your email in one of the reply screen. Would appreciate if you could let me know are you the consultant of the R program and in what cases will you help people with the R question? Looking forward to your early reply. Thanks. Rgds, Angie ---------------------------------

Hi, I can't seem to get an answer for this by searching through the R-help archives: How does one remove leading brackets in print? For example, >print( 3 ) >[1] 3 Would it be possible to get rid of the "[1]"? Of course the effect is the same without "print", as in, >3 >[1] 3 but I would only be interested in omitting brackets in printing, if that's

Is there a native factorial function in R [my searches have been fruitless], or do I need to use gamma() function? ********************************************************************* Dr Peter Caley CSIRO Entomology GPO Box 1700, Canberra, ACT 2601 Email: peter.caley@csiro.au Ph: +61 (0)2 6246 4076 Fax: +61 (0)2 6246 4000 *********************************************************************

Dear R-helpers, i am trying to make a shared library from a Fortran subroutine, and i therefore used (after reading the documentation): Rcmd SHLIB forfile.f #(R1.70, Win2000) And the error is: " 'perl' is not recognized as an internal or external command,operable program or batch file." So i went ahead and tried to install Perl (from the suggested website in

Does anybody know how to make pairs graphics with dots of different colours depending on the value of a categorical variable ? Thanks, Arnaud ************************* Arnaud DOWKIW Department of Primary Industries J. Bjelke-Petersen Research Station KINGAROY, QLD 4610 Australia T : + 61 7 41 600 700 T : + 61 7 41 600 728 (direct) F : + 61 7 41 600 760 **************************