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I've got a question about fitting a known function to a measured data.

Suppose I want to find X parameters by fitting a curve to some measurments - What is the minimum number of measurements needed?

Someone has told me that I need X+1 measurments, (because one degree of freedom), but I didn't understand it...

Could someone tell me if its true, and why

Thanks!

Ted

:-)

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# # of measurments in order to find parameters

**Physics Forums | Science Articles, Homework Help, Discussion**