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age 31
visits member for 2 years, 6 months
seen Mar 23 at 0:07

interested in signal processing for univariate time series.


Feb
17
accepted What calculation remains constant for discretely sampled points of a sinusoid on a window of 1/4th its period?
Feb
14
comment What calculation remains constant for discretely sampled points of a sinusoid on a window of 1/4th its period?
AnonSubmitter85, thanks for the feedback. I guess I have some tutorials to read. Actually I was hoping that there would be a very simple mathematical (non signal-processing) calcualtion but I guess that is not the case?
Feb
10
revised What calculation remains constant for discretely sampled points of a sinusoid on a window of 1/4th its period?
added discrete sampling information
Feb
10
asked What calculation remains constant for discretely sampled points of a sinusoid on a window of 1/4th its period?
Oct
8
comment rotating parabolas in 3D to get part of a circle
So how about the first part of the question: how do you find the center and the radius of that circle? (I edited the second part out because it was confusing).
Oct
8
revised rotating parabolas in 3D to get part of a circle
deleted 486 characters in body
Oct
7
comment rotating parabolas in 3D to get part of a circle
Another way to see the clip is on this link from Geogebratube, but that requires you to install the app into your browser / computer.
Oct
7
comment rotating parabolas in 3D to get part of a circle
Yes, it is a perspective projection.
Oct
6
comment rotating parabolas in 3D to get part of a circle
This is the clip: vimeo * com / 49066857
Oct
6
comment rotating parabolas in 3D to get part of a circle
Yes, the view-point in 3D space, and the radius of that circle after rotating back parallel to the XY-plane.
Oct
4
revised rotating parabolas in 3D to get part of a circle
added 14 characters in body
Oct
4
asked rotating parabolas in 3D to get part of a circle
Oct
4
awarded  Scholar
Oct
4
accepted pick point on parabola so 2 conditions are true
Oct
2
comment pick point on parabola so 2 conditions are true
I understand that B is always going to be the midpoint of A and C, but isn't the logical conclusion that the midpoint of E and B is always going to be the Vertex, no matter where you pick x1, thereby making my question superfluous?
Oct
1
comment pick point on parabola so 2 conditions are true
True, thanks for the comment.
Oct
1
revised pick point on parabola so 2 conditions are true
someone pointed out a mistake in vocabulary
Oct
1
asked pick point on parabola so 2 conditions are true
Aug
25
awarded  Commentator
Aug
25
comment X-axis coordinates of outer control points (only) for a Quadratic Bézier curve through 3 points
If Bx(t) is a parabola (ax^2+bx+c), I can do a regression and find its function, then I can calculate the inverse, apply that to both the data points of Bx(t) and By(t), resulting in Bx(t)_transformed being linear and By(t)_transformed having the same shape as B(t), only this time with evenly spaced x axis coordinates. Correct? A parabola has 2 inverse functions so..