CMPSC/Math 451. March 27, 2015. Nonlinear Least Squares Method. Wen Shen

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CMPSC/Math 451. March 27, 2015. Nonlinear Least Squares Method. Wen Shen

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Wen Shen, Penn State University.
Lectures are based on my book: "An Introduction to Numerical Computation", published by World Scientific, 2016. See promo video: • Book Promo: An Introdu...

Пікірлер: 13

@onursalihgumus6510 4 жыл бұрын

you saved a life madam, thanks for clear explaining

@hellemaibrahim8349 5 жыл бұрын

Thank you for this video, it is really clear!

@orangeflow9809 4 жыл бұрын

So good! I loved this lecture

@user-eh2ec3rn6w 2 жыл бұрын

Thank you very much for your teaching this topic.

@deepsheth8005 5 жыл бұрын

Very nicely explained👍🏻😎

@phanindratube10 5 жыл бұрын

Might be trivial but I do not understand why the water tide problem is linear when you are fitting a curve to data set. Plz help me understand.

@Ferbegnini 7 жыл бұрын

Hello, thank you for this class. I have a doubt: for a mass balance where I want to find the best k: - non-linear: C = C0 * exp(-k*t) - linear: ln (C0/C) = k*t And I want to use the function "fit" in MATLAB. I tried both ways (linear and non-linear, setting the method in the options) and it gave me different results for k. What would be the most correct result? Since linearizing is one extra step, does it input more error to the results? Thank you.

@ridwannana-yawamoako2939 6 жыл бұрын

put coconut on K i.e reduce the problem to one you know how to solve :p

@samyu4473 6 жыл бұрын

at 29:30, initial guess of a=b=0 can satisfy the equations, but they obviously can't be the solution, how did Newton's method avoid this solution? Thank you!

@wenshenpsu 6 жыл бұрын

Newton iteration does not always converge. One must have a good initial guess, which is not easy to find in many situations. There are sampling procedure that searches for a good initial guess, but it's out of the scope of this course. Thanks for watching.

@samyu4473 6 жыл бұрын

Cheers! Thank you for sharing!

@wenshenpsu 6 жыл бұрын

Thanks!

@absolute___zero 4 жыл бұрын

hahaha! so she has a tablet, and could send everyone the file, but yet she is writing it on the chalkboard!! How many years do we have to wait for a projector and a laser pen?