On Oct 28, 2009, at 10:18 AM, David Winsemius wrote:
You might want to take a look at this article by WEI, PERE,
KOENKER, AND HE. Its in the research files of Koenker who is a
regular contributor to R-help:
http://www.econ.uiuc.edu/~roger/research/growth/growth.pdf
In particular it mentions lmsqreg, which would be a package that
implements the L M S methodology used by the CDC to produce these
files. the above paper discusses that package as a starting point
and then offers an alternative using quantreg.
The lmsqreg package can be acquired with this code:
install.packages("lmsqreg", repos="http://R-Forge.R-project.org";)
library(lmsqreg)
There is a function, zscores, that might illustrate how to apply the
L, M, S columns in those CDC datasets. You might consider posting on
the Bioconductor list if these queries are unsuccessfl or contacting
Vincent Carey, who is a Bioconductor Core member and appears to have
done quite a bit of work in related areas:
http://biosun1.harvard.edu/~carey/
(I have taken the liberty of correcting the spelling of the subject
line so it can be found on searches more easily. Seems possible that
searching with that alternate spelling might improve your subsequent
searches as well.)
I had corrected the subject line in my response to Orvalho (not
noticing that he had not copied the list in his reply to me), but he
then pointed out to me that this may be of general interest, and I
suggested that I should be the one to send a copy to r-help. I then
forgot to substitute the English spelling of "anthropometric".
--
David
On Oct 28, 2009, at 3:24 AM, Orvalho Augusto wrote:
Thanks!
Yes I want a program in R that uses that data and produce percentiles
and z-scores. Is there any ready program or not?
Caveman
On Wed, Oct 28, 2009 at 2:16 AM, David Winsemius <[email protected]
> wrote:
On Oct 27, 2009, at 7:27 PM, Orvalho Augusto wrote:
Hey greate ones, is there any way to have something similar to
stata
zanthro on R?
I suppose it is possible that someone will know what is in that
stata
package, but it would make more sense if you were to summarize
what features
would be of use.
I want a package that contains functions to give antropometric
values,
at least for the children.
You are perhaps trying to map ht, weight, and head circumference to
age-specific percentiles???
http://www.cdc.gov/growthcharts/percentile_data_files.htm
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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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
______________________________________________
[email protected] 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.
