Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

That is the the basic form of linear regression by hand. Note that there ARE other ways to do this - more complicated ways (assuming different types of distributions for the data).

To minimize the error, we need to minimize the Linear Regression Cost Function. Lesser the cost function, better the learning, more accurate will be the predictions.

Nonlinear programming is a numerical technique of computing the "optimum levels" of "activities" for an organization or enterpreneur wishing to maximize an "objective function" (say, profit). While ...

Lon-Mu Liu, USE OF LINEAR TRANSFER FUNCTION ANALYSIS IN ECONOMETRIC TIME SERIES MODELLING, Statistica Sinica, Vol. 1, No. 2 (July 1991), pp. 503-525 ...