similar to: R and Feller

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 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: 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: 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,

I recently wrote a function to compute functions over moving windows. (See below). It varies from your request by using the last N points rather than the last N/2 and next N/2 points, so you may have to modify it to get what you want. It will be in the next gregmisc package, which will go out in a month or so when the publication review process here finishes. (I hate red tape!) -Greg

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: 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])

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,

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: 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

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

Hello R People: Suppose I create a function, x.e, via the fix command: > x.e <- fix(x.e) When I type in x.e, the function code appears, along with the name/number of the environment. However, if I create a function, y.e, and source it in, when I type in y.e, the function code only displays(no environment). Why is this, please? (It's not a bug....I just wondered). I am using

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

Dear R People: I am drawing graphs for a College Algebra class. I would like to have the x and y axes, along with the lines that I am plotting. So I leave off the axes, and use xlim and ylim. Then I add my abline(v=0). However, I would like to have tick marks on the abline. How would I do that, please? Thanks in advance! Sincerely, Erin M. Hodgess, Ph.D. Associate Professor Department of

Hi R People: I am on a UNIX operating system, with R 1.0.0, Digital UNIX V4.0D I was able to configure from source very easily. Now here is a Really Dumb Question(RDQ): In src/library, I have a directory called my.package That directory, in turn, has an R and a src directory. The src directory has some FORTRAN code in it. My RDQ is: how do I make the package, please? Thanks! Erin M.

Dear People: Here is a non-R question, please: Does anyone use hevea for Windows to translate LaTex to HTML? If so, how do you get \bar, \sqrt, and \ne, please? I get an error message of unknown macro. Thanks in advance for any help! Sincerely, Erin M. Hodgess, Ph.D. Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown One Main Street

Dear R People: Suppose I want to estimate the parameters of the following AR model: (1 - phi_1 B - phi_2 B^2 - phi_9 B^9) x_t = a_t and I want to use the arima0 command from the ts library. How would I use the order subcommand, please? R Version 1.4.1 for Windows. Thanks! Sincerely, Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston -

Dear R People: On the functions qqnorm and qqline, (found in the base package), what are the references, please? This is R for Windows, Version 1.4.1. Thank you so much! 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