This directory contains the files which were used to 
do the inversion and make the figures for the paper
<a href="v42.pdf">"Approximation and inversion of a complex meteorological 
system via local linear filters"</a> by Schoenberg, Berk, Fovell, Li, 
Lu, and Weiss (2000).  <br><br>

The files are designed for the program R, which is a free unix version of 
S-plus.  The files will thus also work in Splus. <br><br>

The file <a href="getdata.s"> getdata.s </a> will not be useful for most 
users.  It just documents commands we used to get the data, and describes 
the datasets briefly.<br><br>

The files <a href="fig1to2.s"> fig1to2.s </a> and
<a href="fig3to7.s"> fig3to7.s </a> were used to make figures 1 through 2 
and 3 through 7, respectively.<br><br>

Then the file <a href="findh.s"> findh.s </a> was used to construct the 
matrix H.  Its inverse is computed using 
<a href="invert.s"> invert.s </a>.  The inverse is applied to obtain 
input estmates and construct figures 8 and 9 in the file
<a href="applyinverse.s"> applyinverse.s </a>.
<br><br>

Any questions can be addressed to Rick Schoenberg at 
frederic@stat.ucla.edu.