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I have known how to calculate linear regression.

Thanks in advanced.

- Thread starter pyfgcr
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- #1

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I have known how to calculate linear regression.

Thanks in advanced.

- #2

Stephen Tashi

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I don't really understand

- #4

Stephen Tashi

Science Advisor

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Perhaps you haven't studied how the formulas for linear least squares regression are derived.

I don't really understand

In linear regression there are [itex] n [/itex] data points [itex] {(x_1,y_2), (x_2,y_2),...(x_n,y_n) }. [/itex] The function to be minimized is [itex] G(A,B) = \sum_{i=1}^n (A x_i + B - y_i)^2 [/itex] and deriving the formulas involves taking the partial derivatives of [itex] G(A,B) [/itex] with respect to each of [itex] A [/itex] and [itex] B [/itex] and setting them equal to zero to obtain two simultaneous linear equations. Look up how that is done.

The method for the quadratic is similar. It involves minimzing a function of 3 variables [itex] G(A,B,C) [/itex].

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