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How to fit data to a piecewise function?

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#calculus #linear-algebra #statistics #least-squares #piecewise-continuity
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Deriving the least squares estimate of $\beta_{k-1}$

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#statistics #self-learning #estimation #least-squares
71
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matrix algebra and idempotent matrix

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#linear-algebra #matrix-equations #least-squares #idempotents
137
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Proving that a given function $f^*$ is the best least square approximation

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#approximation #regression #least-squares
142
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Calculating the var(β) in a least square regression model

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#regression #least-squares #linear-regression #regression-analysis
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Least Squares : Approximation of cubic polynomial

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218
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Find the derivative of $f(\beta) = (\vec{y} -X\beta)^T(\vec{y} -X\beta)$ using the product rule

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#linear-algebra #derivatives #matrix-calculus #least-squares
869
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Linear Least Squares Problem with Inequality Constraints on Residual

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#linear-algebra #optimization #numerical-linear-algebra #least-squares #numerical-optimization
310
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Linear quadratic regulator via least squares

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#convex-optimization #control-theory #least-squares #optimal-control #dynamic-programming
65
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A statistical robust least-squares problem

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#probability #convex-optimization #least-squares #expected-value #random-matrices
45
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Least squares constrained by fixing the average of the predictions

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#reference-request #least-squares
25
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How can I make a best fit line out of data where each point is weighted more heavily than the previous?

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#least-squares #data-analysis
221
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Computing a best-fit quadratic approximation to a given function over a finite interval

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#multivariable-calculus #approximation #least-squares
865
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How to find the best quadratic approximation to a cubic function between two of its (real) roots

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#calculus #integration #polynomials #approximation #least-squares
190
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Unclear proof in the Gauss-Markov theorem

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#matrices #least-squares

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