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


--
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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