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13
votes
3answers
620 views

Fitting ellipse to 5 given points on the plane

Five points are required to define a unique ellipse. An ellipse has five degrees of freedom: the $x$ and $y$ coordinates of each focus, and the sum of the distance from each focus to a point on the ...
2
votes
1answer
120 views

Plotting a Partially Filled Ellipse

I would like to plot a partially filled/shaded ellipse. The code below shades the whole ellipse. However, I only want to shade the part of the ellipse to the right of the vertical line where x > ...
3
votes
3answers
255 views

Matrix containing ellipse

I have to make a matrix which contains elements in an ellipse shaped region, but I need to make ellipse region in such a way that larger axis of ellipse is inclined with angle θ with horizontal. With ...
1
vote
3answers
320 views

Draw generalized k-ellipse using “the locus of points so that sum of the distances to the foci is constant” deffinition

My goal is to draw a family (for different distances) of 3-ellipse for equilateral set of foci. 3-ellipse definition is: "the locus of points so that sum of the distances to the three foci is ...
0
votes
1answer
204 views

Plotting a line segment from the degenerate case of an ellipse [duplicate]

An ellipse degenerates into a line segment when the defining constant distance from the two foci is the actual distance between the two foci. The ellipse closes into a line segment. The following ...
6
votes
2answers
297 views

How create true reflect movement disk in the ellipse?

Help me please. Task: Disk movement inside the Ellipse so that naturally Disk reflected from the walls and continued to move. Thanks. My friend was able make a move on the square only: ...
11
votes
1answer
492 views

Ellipse counting from image

I have hundreds of images similar to this image: I'm looking to count the number of ellipses as well as their major and minor diameters. The ellipses are touching, hence, ...
5
votes
1answer
347 views

How to make a filled Ellipsoid?

I want to make a filled Ellipsoid, but it seems Filling options doesn't work in Graphics ...
4
votes
1answer
513 views

How to draw a Circle in a graph with Log Y Scale

I've programmed drawing tools for graph images and am experiencing a problem with the coordinates of an Ellipse on a graph with a Log Y axis. It's quite easy to work out the Y Axis coordinates for ...