[R] How to obtain parameters of a mixture model of two lognormal distributions

2007-09-07 Thread Jacques Wagnor
Dear List, I have read that a lognormal mixture model having a pdf of the form f(x)=w1*f1(x)+(1-w1)*f2(x) fits most data sets quite well, where f1 and f2 are lognormal distributions. Any pointers on how to create a function that would produce the 5 parameters of f(x) would be greatly

Re: [R] How to obtain parameters of a mixture model of two lognormal distributions

2007-09-07 Thread Charles C. Berry
On Fri, 7 Sep 2007, Jacques Wagnor wrote: Dear List, I have read that a lognormal mixture model having a pdf of the form f(x)=w1*f1(x)+(1-w1)*f2(x) fits most data sets quite well, where f1 and f2 are lognormal distributions. Whoa! There have to be a lot of qualifiers on an assertion like