[R] estimating mean income

Hi: This is more a statistical question than an R question (apologies!). I have some income data as follows: $5000 : 598 $5000-$1 : 2586 $65001-$7 : 202 $70001+ : 446 I.e an open ended income class for incomes $70k. What would be the best way to estimate mean income? Something

Re: [R] Find a rectangle of maximal area

- to-me-2.html Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https://stat.ethz.ch

Re: [R] Solving an optimization problem: selecting an amp;quot;optimalamp;quot; subset

can drop the binary variable d0. The condition one of a_p,a_m is zero holds automatically as we are minimizing a_p+a_m. Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http

Re: [R] Solving an optimization problem: selecting an quot;optimalquot; subset

automatically in the optimal solution. Examples: x=10: d1=10,d2=0 = abs(x)=d1+d2=10 x=-2: d1=0,d2=2 = abs(x)=d1+d2=2 Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com

Re: [R] Solving an optimization problem: selecting an quot;optimalquot; subset

=0 x[i] in {0,1} Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https

Re: [R] Solving an optimization problem: selecting an quot;optimalquot; subset

-selecting.html. Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https

Re: [R] optimization problem

Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com On Sat, Jan 16, 2010 at 11:42 PM, Ravi Varadhan

Re: [R] optimization problem

I also have doubts this can be formulated correctly as a linear assignment problem. You may want to check the results with a small example. Erwin Erwin Kalvelagen Amsterdam Optimization Modeling Group er

Re: [R] optimization problem

. For small problems you often get the optimal solution, but the error caused by linearizing the objective becomes larger if the problems are larger. But the approximation is actually very good. Erwin Erwin Kalvelagen Amsterdam Optimization

Re: [R] optimization problem

Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help

Re: [R] optimization problem

Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide

Re: [R] NLS-Weibull-ERROR

alpha beta -0.7558506 0.0002816 5.3169457 residual sum-of-squares: 263.6 Number of iterations to convergence: 3 Achieved convergence tolerance: 1.599e-06 Erwin Kalvelagen Amsterdam Optimization Modeling Group er

Re: [R] A combinatorial optimization problem: finding the best permutation of a complex vector

See also: http://yetanothermathprogrammingconsultant.blogspot.com/2009/11/assignment-problem.html http://yetanothermathprogrammingconsultant.blogspot.com/2009/11/assignment-problem.html Erwin Kalvelagen Amsterdam Optimization

Re: [R] A combinatorial optimization problem: finding the best permutation of a complex vector

- Optimal: Objective = 1.6173194067e+003 Network time =1.58 sec. Iterations = 209126 (102313) Even solved as an LP this takes about 150 seconds. (The solutions are the same as reported by solve_LSAP). Erwin Kalvelagen Amsterdam

Re: [R] Non linear programming optimization (which package to use?)

. Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read

Re: [R] Non linear programming optimization (which package to use?)

Erwin Kalvelagen Amsterdam Optimization Modeling Group er...@amsterdamoptimization.com http://amsterdamoptimization.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting