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2d
comment Fitting a rectangle to a point set
@FooBar: Would you care to post a sample data set of a few dozen points for the sake of illustration?
2d
answered Fitting a rectangle to a point set
2d
comment Fitting a rectangle to a point set
Yes, you read my mind. How big will the data set be and how well scattered will the points be around the perimeter?
Feb
5
comment Fitting a rectangle to a point set
Is the rectangle in general position, or is it known that the sides are oriented to $x$ and $y$ axes?
Feb
5
revised Condition number of $X^{T}AX$
fixed omission toward end with squaring of D
Feb
5
answered Condition number of $X^{T}AX$
Feb
4
awarded  Civic Duty
Feb
4
reviewed No Action Needed Approximation properties of FEM projections operators on a boundary
Feb
4
comment Does this Algorithm (probably Fourier like) Exist for 2D Shapes?
There is an area of numerical research connected with moving boundaries called "shape functions". An earlier Question here may be enough of an introduction to decide if the material is of possible interest: Basic explanation of shape function.
Feb
4
comment Does this Algorithm (probably Fourier like) Exist for 2D Shapes?
While I can understand not wanting to change the title in a manner that short-circuits the Question being asked, it seems to me that the change was a reasonable one, given your own discussion of "an analogue... to the Fourier decomposition" in the body of the Question. In any case a title that more specifically alerts Readers to the topic of discussion than "Does this Algorithm Exist?" would be an improvement.
Feb
4
reviewed Leave Closed Does this Algorithm (probably Fourier like) Exist for 2D Shapes?
Feb
1
comment Help understanding and implementing fast multipole method for N-body
Perhaps you could add a few more words about how this link leads to an answer of your Question? What does it really explain about the algorithm that you found useful, esp. as regards understanding or not understanding the math per your Question's context? If a link should go bad, knowing more about what was originally there can help to replace or recover it. Also it gives a Reader more of a basis to decide whether a link is worth following.
Feb
1
comment Help understanding and implementing fast multipole method for N-body
Your mileage may vary, but while I could imagine using an implementation of the Fast Multipole Method without understanding its mathematical justification, I would think a substantial understanding was needed to write and test an implementation.
Jan
30
comment what is the best way to code a formula to reduce roundoff error
Thanks for the clarification. I'm pretty sure Mathematica will use the standard branch cut, so I'll post a picture to illustrate the region of subtractive cancellation.
Jan
29
revised what is the best way to code a formula to reduce roundoff error
a couple of clarifying phrases/corrections
Jan
29
answered what is the best way to code a formula to reduce roundoff error
Jan
29
revised Round-robin pairings: Everybody need to meet everybody
revised title for substance
Jan
29
reviewed Reviewed what is the best way to code a formula to reduce roundoff error
Jan
29
comment what is the best way to code a formula to reduce roundoff error
I've tried converting you expression to $\LaTeX$. Please check it over to see if I introduced some mistakes.
Jan
29
revised what is the best way to code a formula to reduce roundoff error
math formatting