Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
| From | "Hasan, Syed" <syed.hasan@anu.edu.au> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | st: Rule-of-thumb bandwidth in lpoly |
| Date | Fri, 18 May 2012 19:14:37 +1000 |
Hi
The command lpoly calculates a rule of thumb (ROT) bandwidth, when it is
not specified. I am trying to understand the ROT bandwidth calculation.
Looking at the lpoly.ado file (185-221 line) I found the following
if `"`bwidth'"' == "" {
qui gen byte `bw'= 0
}
else {
...................................................
}
qui gen double `bw' = `bwidth' if `tousegrid'
}
In addition, in 305-306 line, I found the following
mata: _lpoly_work(`degree',`pwidth', `l', `u', ///
`doSE', &_lpoly_`kernel'(), `savevar')
I am not sure what it is doing.I am new is STATA programming and
appreciate any help.
Kind regards
Syed Hasan, RSE, ANU
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/