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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