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 Drawing envelope of a simusoidal function		  New Topic  Reply to Topic
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sbaruah25

Albania
Posts
Posted - 07/12/2004 :  12:03:08 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi,
I am new to Origin and would like to have some advice. I want to draw the outer envelope of a sinusoidal function whose amplitude also varies periodically. How can I draw the outer envelope and record the points it passes through?
Also, if a prticle moves in circles with two frequencies (like the moon revolving around the earth and also around the sun) and I have its position at different times, then can I seperate the data corresponding to the two frequencies? I want to plot the radii of the two circles with respect to time seperately.
Thanks for your suggestions.

easwar

USA
1964 Posts
Posted - 07/12/2004 :  09:25:09 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello,

Regarding drawing outer envelopes, try the following:
http://www.originlab.com/FileExchange/details.aspx?C=5&cid=18&fid=39

As for separating data corresponding to the two frequencies of motion, have you tried FFT filtering?

Easwar
OriginLab
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