This query probably cannot be answered without further detailed information about the intended goal of the statistical analysis. And even then, there may be some difficulties! Linear principal compo
Hi all! Given a (long) vector x I need to determine the vector y which is closest to it in the least squares sense of minimum sum ( (x-y)^2 ) such that y is monotone increasing. this problem comes up
Oops! Sorry about a small error in my posting. The solution ``rnorm(n)/rnorm(1)'' assumes a particular `covariation' structure for the multivariate distribution. Usually the numerator needs to be lin
Gonzalo Mari (gmari@math.carleton.ca) asks how one may generate a Multivariate Cauchy in Splus... This is a special case of the multivariate t-distribution, which is defined as a multivariate normal
I need to evaluate the standard Bessel function J_0 for a broad range of real-valued arguments. Although there is a NAG routine (S17AEF) that does this the thought of trying to link it up with S-Plus
I am running S-PLUS Version 3.4 Release 1 for Silicon Graphics Iris, IRIX 5.3. i have a large ascii file, over 100,000 lines long, one number on each line: 0.766007 0.916291 0.924875 0.924710 0.9143
thanks to everyone who provided suggestions regarding my trying to read in a large data set using the scan command. the quickest fix turned out to be one suggested by berwin turlach: namely to use re
In partial reply to Thomas (yee@scitec.auckland.ac.nz) who wrote seeking code for generating the Inverse Gaussian: The Inverse Gaussian is a special case of the Stable Laws; one should therefore be a
In developing new statistical procedures & algorithms for the widely assorted situations that have been of interest to me over the years, it is remarkable just how frequently I have found myself nee
Frank Haertel inquired: I teach a course on `Statistical Methods for Investment and Finance' at the University of Toronto, and this type of question comes up in a number of contexts. Briefly, an n x
I am using Version 3.4 Release 1 for Silicon Graphics Iris, IRIX 5.3 of S-Plus on a UNIX system, and an HP Laserjet 4si printer. I need to produce grey scale images using the `image' command in S-Pl
this problem was just too nice for me to resist trying! here is one, admittedly somewhat hasty, basic idea. say m, d, and p are the names of the three vectors (say) that you mention. suppose also th
Hello S-Plus users! I am working on some statistical algorithms that require the use of quadratic programming methods. Does anyone know how I might incorporate such methods within S-Plus? Any pointer
Hello S-Plus users! This is a follow-up to the following inquiry that I posted to this mail-group earlier today: Doug Martin has very kindly indicated that MathSoft will "soon" begin beta testing a c
This is in response to Charlie Roosen's (of MathSoft) query regarding product ideas... 1. In the context of time series analysis, the options for doing transfer function modelling in the time domain