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Dear R-Helpers, I have a matrix where the first column is known. The second column is the result of multiplying this first column with a constant "const". The third column is the result of multiplying the second column with "const"..... So far, I did it like this (as a simplified example): nr.of.columns <- 4 myconstant <- 27.5 mymatrix <- matrix(numeric(0), nrow=5,

Dear R-Users, given you have been teaching R to students (grad level, mainly social science background, no previous programming experience, 80% know SPSS), what are your experiences concerning the style of teaching? Do you prefer to stand in front of the class like in "normal" lectures and you show them slides? Or do you you explain some concept (for example things like

Hi, > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Corey Powell > > Do you know of any references that verify the accuracy of R > for basic statistical calculations and tests. The results of > these studies should indicate that R results are the same as > the results of other statistical packages to a certain number > of decimal places on some benchmark

Dear all, I have a population with three age-classes, at time t=0 the population is: n.zero <- c(1,0,0) I have a transition matrix A which denotes "fertility" and "survival": A <- matrix(c(0,1,5, 0.3,0,0, 0,0.5,0), ncol=3, byrow=TRUE) To obtain the population at t=1, I calculate: A %*% n.zero To obtain the population t=2, I calculate: A %*% (A %*% n.zero) ... and so

Dear all, I wanted to make a two-way-table of two variables with a counting variable stored in another column of a dataframe. In version 1.9.1, the behavior is as expected as shown in the simplified example code. > sex <- rep(c("F", "M"), 5) > income <- c(rep("low", 5), rep("high", 5)) > count <- 1:10 > mydf <-

Dear all, given I have data in a data.frame which indicate the number of people in a specific year at a specific age: n <- 10 mydf <- data.frame(yr=sample(1:10, size=n, replace=FALSE), age=sample(1:12, size=n, replace=FALSE), no=sample(1:10, size=n, replace=FALSE)) Now I would like to make a matrix with (in this simple example) 10 columns (for the

Dear all, This is a rather lengthy message, but I don't know what I made wrong in my real example since the simple code works. I have two variables a, b and a function f for which I would like to calculate all possible combinations of the values of a and b. If f is multiplication, I would simply do: a <- 1:5 b <- 1:5 outer(a,b) ## A bit more complicated is this: f <-

Dear all, This is a rather lengthy message, but I don't know what I made wrong in my real example since the simple code works. I have two variables a, b and a function f for which I would like to calculate all possible combinations of the values of a and b. If f is multiplication, I would simply do: a <- 1:5 b <- 1:5 outer(a,b) ## A bit more complicated is this: f <-

Hello, If a matrix with 5 columns has been defined and the first two columns need to be sorted in ascending order, how can this be achieved whilst ensuring the other 3 columns data are in relative position to the sorted columns? Glen Jones [[alternative HTML version deleted]]

Dear all, I'd appreciate any hints how to arrange some plots. I have three plots. I would like to arrange them in the following order: - Plot 1 and Plot 2 should be in the upper row - Plot 3 should be in the lower row but centered in the middle. I hope the following sketch will help understanding my problem ================ | === === | || P1| |P2 | | || | | | | | === === |

We can't post images here so I've put up a web page to show off a neat little animation in R: http://www.geocities.com/robsteele/ Adios!

Dear all, in the first paragraph in Section 4.3.2 of the "R Data Import/Export Manual", it is written 'We havew tested...'. Most likely it should be 'We have tested...' It is just such a minor thing that I was unsure whether to submit a bug report. I use now R 2.2.1 on Win32 but I guess this is independent of the platform and version. Best, Roland P.S. Thanks for

Dear all, my question might be a bit off-topic. Is there anything like a standard textbook on statistical programming? With that I don't mean anything like MASS, S Programming, Programming with Data, ... (no offense meant, they are fantastic books and each of those three helped me a great deal). Rather in the direction of the "Numerical Recipes" Series addressing how to implement

Dear all, I installed Mandrakelinux 10.1 (community) on my notebook. Before, I used Mandrakelinux 9.1 (and later 10.0 as an update). Now I wanted to compile, as before, R. In the beginning, nothing worked but it seemed to be the problem of GCC 3.4.1 which was shipped with my distribution. After downloading and compiling GCC 3.4.3 everything went smoothly during the compilation of R. The problem

Dear all, when making a DLL via Rcmd SHLIB is there a way to link against a library such as Rblas (I am on a Windows platform) on a case to case basis? I played a bit around with some self-written C-code which should call the function 'dasum' defined in Blas.h. I encountered the following problem: u:\codeplay>Rcmd SHLIB mysumming.c Rcmd SHLIB mysumming.c gcc --shared -s -o

Dear all, (Sorry if the question has already been answered.) Could someone please suggest a good text editor for writing R sources ? (I know emacs exists ... but I find it a bit heavy). I use crimson (http://www.crimsoneditor.com) which is small and simple, but the R syntax seems not to be supported. Thanks for any advice

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Dear all, I am trying to install the R-2.0.0-1mdk.i586.rpm <http://cran.planetmirror.com/bin/linux/mandrake/10.0/R-2.0.0-1mdk.i586.rpm> file on mandrake 10.1. Since the file is, originally, meant for Mandrake 10.0, it is not surprising me that the installation does not work. The error message that I get can be translated in something like: "impossible to install since the info

Dear R-users, I'm struggling in R in order to "squeeze" a matrix without using a for-loop. Although my case is a bit more complex, the following example should help you to understand what I would like to do, but without the slow for-loop. Thanks in advance, Carlo Giovanni Camarda A <- matrix(1:54, ncol=6) # my original matrix A.new <- matrix(nrow=3, ncol=6) # a new

Dear all, I would like to produce a map with information about the patenting activity in German districts, by coloring districts with different degrees of patenting activity in different colors. I work with the packages maptools, maps and spdep. The map data is read from an external .shp file (+ the corresponding .shx and .dbf files). Plotting a map with the IDs or the patenting indicator itself