R help - Oct 2004 - How to plot PDF which is in the form of orthogonal polynomial

Dear all
using the orthogonal polymial on a set of data, I get an approximate 
density which basically is in the form: exp(-polynomial),
  as you know, the 
parameters are the converged coeeficients.
obviously, It is hard, if not impossible, to use the inverse CDF method to 
get a 
sample and then plot density. then how can I plot the approximated density 
in order to have a graphical comparision with the real data's histogram.

any hint is appreciated

thanks

I am not sure that I understand very well what you want to do but you might 
want to try
density().  There are some good examples for this function under 
example(density). The result is an object with class "density" that
you can
plot directly using plot()

Francisco


PS: I reccomend you to read the posting guide 
http://lib.stat.cmu.edu/R/CRAN/ so you can get better answers
>From: Yong Wang <wang at galton.uchicago.edu>
>To: r-help-request at stat.math.ethz.ch
>CC: r-help at stat.math.ethz.ch
>Subject: [R] How to plot PDF which is in the form of orthogonal polynomial 
>Date: Sat, 30 Oct 2004 11:19:16 -0500 (CDT)
>
>Dear all
>using the orthogonal polymial on a set of data, I get an approximate 
>density which basically is in the form: exp(-polynomial),
>  as you know, the parameters are the converged coeeficients.
>obviously, It is hard, if not impossible, to use the inverse CDF method to 
>get a sample and then plot density. then how can I plot the approximated 
>density in order to have a graphical comparision with the real data's 
>histogram.
>
>any hint is appreciated
>
>thanks
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! 
>http://www.R-project.org/posting-guide.html

Dear all
using the orthogonal polymial on a set of data, I get an approximate 
density
which basically is in the form: exp(-polynomial),
  as you know, the parameters are the converged coeeficients.
obviously, It is hard, if not impossible, to use the inverse CDF method to 
get
a sample and then plot density. then how can I plot the approximated 
density in
order to have a graphical comparision with the real data's histogram.

any hint is appreciated

thanks