lybaomc
2009-Oct-20 07:50 UTC
[R] HOW to determine the number of components of the mixture model stratfied by age
Hi,all
with my data,there are more than 1000 quantitative results of antibody
concentrations, there may be 2 components(positive and negative), or 3
components (may be strong positive, positive, and negative), or 4-6
components. Could you tell me how to determine the number of components of
the mixture model? the "anova.mix" in mixdist of the R software seems
not
work.
my data is a little complicated(TABLE ), there are more than 1000
quantitative results of antibody concentrations stratified by age.The
overall density of results at age j, Fj, is a mixture of the component
densities, so if there are 5 age groups, then there will be 5 mixture
models. Do i have to analyse each stratum respectively?
TABLE
------------------------
age Bin length freq
------------------------
1 1 19.75 4
1 2 21.75 10
????
1 12 41.75 36
????
------------------------
2 1 19.75 4
2 2 21.75 10
????
2 12 41.75 36
????
-----------------------
appreciated
lybao
--
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lybaomc
2009-Oct-29 02:41 UTC
[R] HOW to determine the number of components of the mixture model stratfied by age
DOES NOBODY KNOW? HELP! lybaomc wrote:> > Hi,all > > with my data,there are more than 1000 quantitative results of antibody > concentrations, there may be 2 components(positive and negative), or 3 > components (may be strong positive, positive, and negative), or 4-6 > components. Could you tell me how to determine the number of components of > the mixture model? the "anova.mix" in mixdist of the R software seems not > work. > > my data is a little complicated(TABLE ), there are more than 1000 > quantitative results of antibody concentrations stratified by age.The > overall density of results at age j, Fj, is a mixture of the component > densities, so if there are 5 age groups, then there will be 5 mixture > models. Do i have to analyse each stratum respectively? > > TABLE > ------------------------ > age Bin length freq > ------------------------ > 1 1 19.75 4 > 1 2 21.75 10 > ???? > 1 12 41.75 36 > ???? > ------------------------ > 2 1 19.75 4 > 2 2 21.75 10 > ???? > 2 12 41.75 36 > ???? > ----------------------- > > appreciated > > lybao >-- View this message in context: http://www.nabble.com/HOW-to-determine-the-number-of-components-of-the-mixture-model-stratfied-by-age-tp25971060p26105416.html Sent from the R help mailing list archive at Nabble.com.
David Winsemius
2009-Oct-29 11:05 UTC
[R] HOW to determine the number of components of the mixture model stratfied by age
On Oct 28, 2009, at 10:41 PM, lybaomc wrote:> > DOES NOBODY KNOW? > HELP!You submitted a question that appeared somewhat vague and had no reproducible example. Sometimes people will step forward and create a particular example to demonstrate coding options but there is no expectation that someone _should_ do so. Generally the cycle time to an answer is less than 24 hours so during the last week you should have been asking yourself what _you_ might have in the construction of your question that made it answer-unworthy. Read the Posting Guide. The answer to "how to write a good question" for r-help should be there. -- David.> > lybaomc wrote: >> >> Hi,all >> >> with my data,there are more than 1000 quantitative results of >> antibody >> concentrations, there may be 2 components(positive and negative), >> or 3 >> components (may be strong positive, positive, and negative), or 4-6 >> components. Could you tell me how to determine the number of >> components of >> the mixture model? the "anova.mix" in mixdist of the R software >> seems not >> work. >> >> my data is a little complicated(TABLE ), there are more than 1000 >> quantitative results of antibody concentrations stratified by age.The >> overall density of results at age j, Fj, is a mixture of the >> component >> densities, so if there are 5 age groups, then there will be 5 mixture >> models. Do i have to analyse each stratum respectively? >> >> TABLE >> ------------------------ >> age Bin length freq >> ------------------------ >> 1 1 19.75 4 >> 1 2 21.75 10 >> ???? >> 1 12 41.75 36 >> ???? >> ------------------------ >> 2 1 19.75 4 >> 2 2 21.75 10 >> ???? >> 2 12 41.75 36 >> ???? >> ----------------------- >> >> appreciated >> >> lybao >> > > -- > View this message in context: http://www.nabble.com/HOW-to-determine-the-number-of-components-of-the-mixture-model-stratfied-by-age-tp25971060p26105416.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.David Winsemius, MD Heritage Laboratories West Hartford, CT