linear-algebra

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Spectral Clustering, Image Segmentation and Eigenvectors

Based on the book Computer Vision a Modern Approach page 425, I attempted to use eigenvectors for image segmentation.[详细]

2023-03-22 15:21 分类：问答
Generalized eigenvalue problem

I\'m trying to convert a generalized eigenvalue problem into a normal eigenvalue calculation. I have this code:[详细]

2023-03-21 15:30 分类：问答
Sparse Matrix Libraries for Ruby

I\'m looking for a Sparse Matrix library I can use from Ruby. I\'m currently using the GNU Scientific Library bindings provided by the \"gsl\" gem, but my application would be better optimized if I us[详细]

2023-03-21 13:22 分类：问答
How can I reliably move a character between an array of points?

I currently have an array of points (x,y) from the result of an A* pathfinding function. This array is set up so that the first index is the point closest to the character and the next one is the next[详细]

2023-03-20 05:39 分类：问答
axes separated by angles

I\'m trying to generate some axis vectors from parameters commonly used to specify crystallographic unit cells.These parameters consist of the length of the three axes: a,b,c and the angles between th[详细]

2023-03-18 01:54 分类：问答
Closest point on circle in 3d. What's missing?

I hope I manage to explain this clearly. I am trying to calculate the closest point on a circle in 3D. I found the following solution:[详细]

2023-03-17 16:29 分类：问答
How to set UMFPACK's tolerance

I am using umfpack in c++ to solve a sparse matrix. I am having trouble finding wher开发者_运维问答e the [UMFPACK PIVOT TOLERANCE] parameter is set. Would anybody know how to set this control paramete[详细]

2023-03-16 21:21 分类：问答
Difference between dtrtrs and dtrsm

I am looking for some triangular solvers, and I have come across two solvers. One in BLAS: dtrsmand another in LAPACK: dtrtrs. From the looks of it both seem to have common functionality, with dtrsm h[详细]

2023-03-16 14:15 分类：问答
GJK collision detection implementation from 2D to 3D

I apologize for the length of this question and give a pre-emptive thanks for anyone who reads through this![详细]

2023-03-16 05:59 分类：问答
RaptorQ FEC Implementation Obstacle

I am trying to implement the RaptorQ Forward Error Correction Schem开发者_StackOverflowe in java as specified here:[详细]

2023-03-16 01:43 分类：问答