search for: kaniovski

Displaying 6 results from an estimated 6 matches for "kaniovski".

2008 Dec 24
1
Implementing a linear restriction in lm()
Dear All! I want to test a coeffcient restriction beta=1 in a univariate model lm (y~x). Entering lm((y-x)~1) does not help since anova test requires the same dependent variable. What is the right way to proceed? Thank you for your help and marry xmas, Serguei Kaniovski ________________________________________ Austrian Institute of Economic Research (WIFO) P.O.Box 91                          Tel.: +43-1-7982601-231 1103 Vienna, Austria        Fax: +43-1-7989386 Mail: Serguei.Kaniovski@wifo.ac.at http://www.wifo.ac.at/Serguei.Kaniovski [[alternative...
2007 Feb 06
1
Questions on counts by case
...ition by people, then save each portion in a separate file, 2. compute the frequency of "1"'s in "x" for each person by group "gr". So, "mike" will have freq=2/3, as he has two "1" and one "0" in 3 groups. Thanks a lot, Serguei Kaniovski The data looks like: person;gr;x mike;gr1;1 jane;gr1;0 bill;gr1;0 jack;gr2;1 mike;gr2;1 jane;gr2;0 bill;gr2;0 alex;gr2;1 james;gr2;1 mike;gr3;0 bill;gr3;1 jane;gr3;1 ___________________________________________________________________ Austrian Institute of Economic Research (WIFO) N...
2009 Apr 18
5
Dummy (factor) based on a pair of variables
...n the pair (i.e. EITHER an i-country OR an j-country). Thank you for your help, Serguei ________________________________________ Austrian Institute of Economic Research (WIFO) P.O.Box 91                          Tel.: +43-1-7982601-231 1103 Vienna, Austria        Fax: +43-1-7989386 Mail: Serguei.Kaniovski@wifo.ac.at http://www.wifo.ac.at/Serguei.Kaniovski [[alternative HTML version deleted]]
2005 Nov 29
1
Constraints in Quadprog
...bvec, meq=0, factorized=FALSE)" reads contraints using an element-by-element multiplication, i.e. Amat'*x, not using the matrix-product, i.e. Amat'%*%x, required for the sums on the left-hand-side of 1-6). I would very much appreciate a suggestion on this problem. Thank you, Serguei Kaniovski
2005 Dec 06
1
Help on a matrix task
Hello, Being new to R, I am completely stuck with the following problem. Please help to find a general solution to the following matrix task: Given: N<-4 input_mat<-matrix(c(1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0),ncol=N)
2006 Nov 08
0
Solving a maximization problem using QUADPROD
Hello, here is an example from the manual. How to turn this minimization problem into maximization problem, i.e. -(0 5 0) %*% b - 1/2 b^T b? # Assume we want to minimize: -(0 5 0) %*% b + 1/2 b^T b # under the constraints: A^T b >= b0 # with b0 = (-8,2,0)^T # and (-4 2 0) # A = (-3 1 -2) # ( 0 0 1) # we can use solve.QP.compact as follows: # library(quadprog) Dmat <- matrix(0,3,3)