search for: whu

...lly, there is no improvment comparing with using isoMDS. cd<-dist(cm,method="euclidean") loc<-isoMDS(cd,tol = 1e-10,trace=T) Is there parameters that I can change to improve the performance? Or is there any other better methods to do MDS? -- Wu Chen Information Management School, WHU [[alternative HTML version deleted]]

Dear all, I would like to calculate a Moran's I statistic using the moran function in the spdep package. The problem I'm having deals with how to create the listw object. My data stems from the area of social network analysis. I have list of poeple and for each pair of them I have a measure of their relationship strength. So my dataset looks like: Jim; Bob; 0.5 This measure of

...ctually, there is no improvment comparing with using isoMDS. cd<-dist(cm,method="euclidean") loc<-isoMDS(cd,tol = 1e-10,trace=T) Is there parameters that I can change to improve performance? Or is there any other better methods to do MDS? -- Wu Chen Information Management School, WHU [[alternative HTML version deleted]]

Hi, if I specify the width and height of a plot I want to see via > X11(width=14,height=7) > X11(width=28,height=14) > X11(width=20,height=14) > X11(width=13,height=14) > X11(width=15,height=14) any width greater than 15 is ignored as it seems the width is limited by the screen width. However, as I am using two screens (xinerama), I can easily manually resize to fit two

Hey, this may be a simple question, but I am struggling to apply a list of parameters to a function. Say I have the following function: test<-function(a=1,b=2,c=3,d=4){a+b+c+d} And the following list: point<-list(a=3,d=2) Is there a way I can evaluate function test at point? (Apart from changing function test to take in a list, and take values out of the list, but I'd rather

Dear all, I am using the DeSolve Package to simulate a system dynamics model. At the problematic point in the model, I basically want to decide how many products shall be produced to be sold. In order to determine the amount a basic forecasting model of using the average of the last 12 time periods shall be used. My code looks like the following. ? [?] # Time units in month START<-0;

Dear all, I have a question regarding the spdep package: Assume that each person within my dataset is characterized by a continuous variable y. In order to test for spatial autocorrelation in y I calculated a Moran's I statistic. The problem is that y is also likely to be influenced by a series of other variables x that are unique to each person in my dataset. To test to which extent the

Dear all, I have a large dataset (N=100,000 with 89 variables per subject). This dataset is stored in a 100.000 x 89 matrix where each row describes one individual and each column one variable. What is the easiest way of selecting a subset of let's say 1.000 individuals out of that whole matrix? Thanks, Michael Michael Haenlein Associate Professor of Marketing ESCP-EAP European School of

Hi, I have trouble with Sweave (I think) cutting of my newlines. As stated in the help of Sweave, I generate tex code straight from R for dynamically computed reports. If I do this in R: for (i in 0:4) {cat("\n",i,"\n")};cat("\n 3") 0 1 2 3 4 3 The output looks correct. However, Sweave for some reason seems to trim everything outside