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Oliver


Massachusetts Institute of Technology

2011 年からアクティブ

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質問


How to identify repeated eigenvalues?
I have a relatively large matrix (1771 x 1771), representing the laplacian of a graph. Looking at the eigenvalues of this matrix...

約8年 前 | 1 件の回答 | 0

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質問


Smooth Animated Transition Between Linear and Log Scale
I would like to animate a plot as it smoothly transitions from a linear scale to a log scale. I have tried changing the axis tic...

10年以上 前 | 0 件の回答 | 0

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質問


voronoi with custom distance metric
I would like to compute a voronoi diagram using a non-Euclidean distance metric. I do not see anything in the documentation of v...

10年以上 前 | 0 件の回答 | 0

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質問


How to find unique rows with unordered elements?
Say I have the following matrix: >> A = [1 2 3; 2 4 6; 3 1 2; 1 1 1] A = 1 2 3 2 4 ...

約11年 前 | 1 件の回答 | 0

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質問


Triangulate a non-convex point set
I have a set of points in 3D that define the surface of a non-convex object, I would like to generate some kind of triangulation...

約11年 前 | 1 件の回答 | 1

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質問


Problem with Axes Box Property
I have a figure with several subplots. I want each to have a box around it. In order to do this I use: set(hax,'xtick',[],'...

約11年 前 | 0 件の回答 | 0

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質問


Figure/Axes dependent patch facet visibility?
I have a patch object that I am trying to plot in an existing plot, however, for some reason some of the facets are not showing ...

約11年 前 | 0 件の回答 | 0

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質問


Matrix left division with constraints?
I have an underdetermined system of equations A*x=b, and I am looking for any non-negative solution. I.e. A is an n-by-m matrix ...

11年以上 前 | 2 件の回答 | 0

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質問


"Very" high dimensional convex hulls
I am trying to generate points that are uniformly distributed over a convex hull in a high dimensional space. What I have as ...

11年以上 前 | 3 件の回答 | 2

3

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質問


How to vectorize this type of function?
I have a function of the form: f(a) = sum((-1)^n/factorial(a-n)) where the summation limits are n = 0 to a. If a is a sc...

11年以上 前 | 1 件の回答 | 0

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質問


Ideas for vectorizing? (Computing multiple sumations simultaneously even though the max and min are different for each)
I have two vectors, "nmin" and "nmax" which respectively contain the starting and ending indices for numel(nmin) sums that I nee...

11年以上 前 | 1 件の回答 | 0

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質問


How to avoid for loops when generating index arrays?
I often find myself coding nested for loops to generate vectors of integer indices. For example: n = 4; i = 1; for L ...

11年以上 前 | 6 件の回答 | 1

6

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質問


Why are relational operators so slow in this case?
I have a 2305-by-4-by-4455 array, "P", from which I want to generate a logical vector, "isdis", for indexing as follows: i...

12年弱 前 | 2 件の回答 | 0

2

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質問


Efficient evaluation of a hyper-spherical harmonic expansion.
I need to integrate a function that is expressed as a hyper-spherical harmonic expansion. This function has many terms and the ...

13年以上 前 | 0 件の回答 | 0

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質問


startup.m problem
In my startup.m file I install a toolbox each time matlab is loaded (because I store the toolbox in my Dropbox folder since I fr...

13年以上 前 | 2 件の回答 | 0

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質問


Error with dynamically created m-files
As part of a function I have written called "make_odf_pos.m" I have a section of code that writes a helper function to a tempora...

13年以上 前 | 2 件の回答 | 0

2

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質問


How can a breakpoint affect the result of a computation?
I am debugging and I have a block of code that gives a different answer depending on the location of a breakpoint. The code is i...

13年以上 前 | 2 件の回答 | 0

2

回答

送信済み


Angular Momentum Coefficients
Functions to calculate Clebsch-Gordan, Wigner 3-j, Wigner 6-j, and Wigner 9-j coefficients

13年以上 前 | ダウンロード 2 件 |