polyfit question

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Andy 2012 年 1 月 27 日
I used polyfit like this:
where both avg_Y, and x are 12 by 1 matrix. my purpose is try to find a best fit line (if there is any other way of doing it, please tell me).
Matlab gives me 0.0042 2.5802
what do i do with these numbers? What do they mean? i read help center but it wasnt too helpful. Thanks


Honglei Chen
Honglei Chen 2012 年 1 月 27 日
It means
avg_Y = 0.0042*x+2.5802
doc polyfit

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