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st: convolution


From   "Andreas Aschbacher" <aa_surf@gmx.at>
To   statalist@hsphsun2.harvard.edu
Subject   st: convolution
Date   Mon, 22 Mar 2004 12:45:59 +0100 (MET)

Dear fellows !

I have two functions :

i) f1[x_]:= Exp[-(x-y)^2/(2*(s^2))];
ii) f2[x_]:= .1/(x + .1);
with:
s = 1;
y = 1;
->
now I make convolution-integral:
ff[d_]:=NIntegrate[f1[d-x] f2[x],{x,0,d}];
->
now I plot the three functions with:
Plot[{f1[x],f2[x],ff[x]},{x,0,10}]

// all the syntax is from mathematica //

this is a new way to "compose" two functions,not additive as I always did
with LevenbergMarquardt,now I have composition in the way of convolution!
-I try to change parameters s and y to "fit" measurement-curve.
my question:
is there a deconvolution-possibility in Stata ??
with -denormix- I don't have the possibility of de-convolution
in the sense of above,despite it was useful to get to know it.

andreas aschbacher




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