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Re: Center of mass??? [message #17757 is a reply to message #17710]

Thu, 11 November 1999 00:00

Anders Wennerberg
Messages: 3
Registered: November 1999

Junior Member

Thanks for the help!
Yours
Anders
David Fanning wrote:

> Paul Hick (pphick@ucsd.edu) writes:
>
>> Reasoning by analogy to the 2D case, this should work, I think:
>>
>> xcm = Total( Total(Total(array,3),2) * Indgen(s[0])) / totalMass
>> ycm = Total( Total(Total(array,3),1) * Indgen(s[1])) / totalMass
>> zcm = Total( Total(Total(array,2),1) * Indgen(s[2])) / totalMass
>
> Well, it seems to work in the simple-minded cases I
> tried it on. :-)
>
> I'll write it up in an article if no one else has
> serious objections.
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting
> Phone: 970-221-0438 E-Mail: davidf@dfanning.com
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Center of mass??? By: Jonathan Joseph on Tue, 09 November 1999 00:00
		Re: Center of mass??? By: J.D. Smith on Tue, 09 November 1999 00:00
		Re: Center of mass??? By: Dick Jackson on Tue, 09 November 1999 00:00
		Re: Center of mass??? By: davidf on Mon, 08 November 1999 00:00
		Re: Center of mass??? By: Paul Hick on Mon, 08 November 1999 00:00
		Re: Center of mass??? By: davidf on Thu, 11 November 1999 00:00
		Re: Center of mass??? By: Anders Wennerberg on Thu, 11 November 1999 00:00
		Re: Center of mass??? By: J.D. Smith on Wed, 10 November 1999 00:00
		Re: Center of mass??? By: davidf on Mon, 08 November 1999 00:00

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