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linear fit y=ax [message #46672]

Wed, 07 December 2005 08:14

lajam
Messages: 4
Registered: September 2005

Junior Member

Hello,

I have a very easy question but I didn't find the answer in the IDL
reference guide. I want to fit data with a linear fit y=ax. I want to
impose my fit to pass by zero. I have looked at the linfit, regress,
... functions and I didn't understand how to adapt these functions for
my problem. I have tried with regress:
result=regress(desired_value,calculated_value,weigths) but I'm not sure
that it's the regular way to obtain calculated_value=A*desired_value.
Could someone help me, please?

Thanks,
Cedric

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