similar to: FW: Cent. Mov. Ave

Dear R People: Here is an interesting question(I think) Suppose I want to calculate Centered Moving Averages; i.e. x[1] <- ( sum(y[1:12]) )/12 x[2] <- ( sum(y[2:13]) )/12 and so on. Of course, this is easily done through loops. However, I have been trying to do this more elegantly, but have failed. I have tried things like j1 <- 1:109 j2 <- 12:120 x[1:109] <- ( sum( y[j1:j2])

>From spencer.graves at PDF.COM Mon Jun 23 14:36:45 2003 Received: from postal.pdf.com (pdf193.pdf.com [209.128.81.193]) by uhddx01.dt.uh.edu (8.9.2/8.9.2) with ESMTP id OAA09671 for <hodgess at uhddx01.dt.uh.edu>; Mon, 23 Jun 2003 14:36:44 -0500 (CDT) Received: from postage.pdf.com (postage.pdf.com [10.10.8.7]) by postal.pdf.com (Switch-3.0.4/Switch-3.0.0) with ESMTP id

Dear R People: Here are the answers, received before I could say "Miniature Schnauzer": Thanks to Prof. B, and Dr. E! Sincerely, Erin From: Douglas Bates <bates at stat.wisc.edu> Date: 22 Mar 2000 17:28:17 -0600 Erin Hodgess <hodgess at uhddx01.dt.uh.edu> writes: > Hi R People: > > I am on a UNIX operating system, with R 1.0.0, Digital UNIX V4.0D > >

Dear R People: Is there a library for Multivariate time series, please? For some reason, I'm thinking that Dr. Paul Gilbert may have one? R Version 1.6.2 (i've updated!) for Windows Thanks so much! Sincerely, Erin Hodgess University of Houston - Downtown mailto: hodgess at uhddx01.dt.uh.edu

The cygwin 'cygpath' command can now convert arbitrary windows and unix paths into the short ms-dos 8.3 equivalents. This tools might allow the windows build system to better deal with those messy long Windows file and directory names that contain spaces. EG: warneg@GRDGROL99X1028: src [1]$ pwd /cygdrive/c/Documents and Settings/WarnesGR/My Documents/cygwin_home/src/gregmisc/src

Dear R People: Is there a function for exponential smoothing, please? R version 1.4.1 for Windows. Thanks in advance! Have a great weekend! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown 1 Main Street Houston, TX 77002 mailto: hodgess at uhddx01.dt.uh.edu

Dear R People: I have the source for R version 1.1.1 on a UNIX system alpha-dec-osf4. The ./configure works fine. When I do the make, it works fine until it tries to build the package tcklc. I get an error of Tk_Saf_Init not identified Then it kicks out. Any suggestions, please? Thanks! Sincerely, Erin M. Hodgess, Ph.D. Associate Professor Department of Computer and Mathematical Sciences

Dear R People: Do any of the linear model or regression function calculate the Durbin-Watson test statistic for serial correlation, please? I found the hat matrix, studentized residuals, and so on, but no D-W. Thanks so much! Sincerely, Erin M. Hodgess, Ph.D. Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown One Main Street Houston, TX 77002

Dear R people is there a module for quality control, please? X bar charts, and such? perhaps a contributed package? Thanks in advance! Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown 1 Main Street Houston, TX 77002 mailto: hodgess at uhddx01.dt.uh.edu

Dear R People: Here is a very simple question, please: I have a data frame with the state name, state division, and population. Note: state division is something like Atlantic, Mountain, etc. I want to produce a table with the state division and the total of the populations for the states within that division. I've been messing with "table" but so far, no luck. This is R1.3.1,

Dear r People I have a bootstrap question, please. (this may possibly be a problem with my understanding of the bootstrap) Suppose I have a sample of size 15, x[1], ...x[15]. This is a sample which is small compared to the population. by the way, the x[i] are iid and have a common distribution F. As I understand the bootstrap, that function will take a user specified number of repititions.

Dear R People: I have R Version 0.90.1 for UNIX (binary) and the Windows version from a binary distribution as well. I would like to look at the source code for the C program setup_starma in the ts library. How would I find that, please? Thanks in advance. Sincerely, Erin M. Hodgess, Ph.D. Assistant Professor Department of Computer and Mathematical Sciences University of Houston - Downtown

Dear R People: Suppose I put in the following: > w1 <- expression(2*x) > v1 <- expression(x^2) and I want to get the derivative of w1 * v1 with respect to x > D(w1*v1,"x") Error in w1 * v1 : non-numeric argument to binary operator Is there a way around this, please? Thanks in advance! Sincerely, Erin M. Hodgess, Ph.D. Associate Professor Department of Computer and

Hello, R People: How do I change the size of a graph, please? I tried par(cin=c(8.5,11)) and it said that Warning message: parameter "cin" can't be set in: par(args) > par(fin=c(8.5,11)) > plot(xa,ya) Error in plot.new() : Figure region too large Also, can I set for portrait or landscape, please? Thanks in advance! Erin M. Hodgess, Ph.D. Associate Professor Department

Dear R People: I'm trying to use the predict command on an arima0 object. I do the following: xm.arma <- arima0(xm2,order=c(1,0,1)) predict(xm.arma,n.ahead=2) and I get the message: Error in round(x, digits) : Non-numeric argument to mathematical function Any ideas what the problem might be, please? R version 1 4 1 on Windows. Thanks in advance! Sincerely, Erin Hodgess Associate

Dear R People: Is there code for nonlinear time series available, please? I'm looking for something that could also provide a model for forecasts. This is for R V1.5.1 on a PC. Thank you very much in advance! sincerely Erin Hodgess mailto: hodgess at uhddx01.dt.uh.edu -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Dear R People: Where is the command for long memory time series, please? In S, it's arima.fracdiff Is there something like that in R? If so, which library has it, please? Version 1.5.1 for Windows Happy new year Thanks so much! Sincerely, Erin Hodgess mailto: hodgess at uhddx01.dt.uh.edu

Dear R People: Does anyone have any code for Fractals, chaos, or anything like that, please? This is strictly for demo purposes...decorative only. This is R version 1.5.1 for Windows. Thank you in advance! Have a great weekend! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown 1 Main Street Houston, TX 77002

Dear R People: Here is a non-R probability question, please: There is a problem, originally posed from an American game show, called "Let's Make a Deal." A contestant makes a selection of one door, from Doors 1 through 3. He or she knows that there are 2 goats and 1 car behind those doors. Once the contestant makes the selection, say Door 2, then the host, Monty Hall, tells him

Hello, Although your message is not very explicit about the structure of your data frame, I think you can get what you want by using a combination of the function "split" and the "apply" functions family: apply, lapply and sapply. If you provide a more detailed organization of your data frame, perhaps we can give to you a more wiser advice. Thanks, Carlos. P.S: By the way,