Thank you very much, Elaine.<br><br><div class="gmail_quote">On Thu, Jan 24, 2013 at 3:53 PM, Elaine Meng <span dir="ltr"><<a href="mailto:meng@cgl.ucsf.edu" target="_blank">meng@cgl.ucsf.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Yen,<br>
It is simply a calculation of principal axes where atoms are mass-weighted points, see:<br>
<<a href="http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#inertia" target="_blank">http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#inertia</a>><br>
<br>
I doubt someone would publish a paper about such a fundamental calculation, so although I did not read the J Mol Graph paper, it is likely to be a different method.<br>
<br>
The person who wrote the "measure inertia" code is away currently, but if there is anything else to say, he may send another reply later.<br>
Best,<br>
Elaine<br>
----------<br>
Elaine C. Meng, Ph.D.<br>
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab<br>
Department of Pharmaceutical Chemistry<br>
University of California, San Francisco<br>
<div class="HOEnZb"><div class="h5"><br>
On Jan 24, 2013, at 1:07 PM, Yen-Ting Lai wrote:<br>
<br>
> Hi,<br>
> What's the formula that's used by "measure inertia"?<br>
> I found a paper:<br>
> An ellipsoidal approximation of protein shape. J. Mol Graph (1983)<br>
> Does the "measure inertia" use the same method?<br>
> Thank you!<br>
> Yen<br>
<br>
</div></div></blockquote></div><br>