Use a cube instead of the Utah Teapot in my previous post. I was pleasantly suprised by the final screen shot.... 更多内容 >>
The Computer Graphics Matrix and a Cube
Cleve’s Corner: Cleve Moler on Mathematics and ComputingScientific computing, math & more
搜索结果: Matrices
The Matrix at the Heart of Computer Graphics 7
Matrices like the ones shown in the following screen shots are at the heart of computer graphics. They describe objects moving in three-dimensional space. MATLAB's Handle Graphics uses them. So does MathWork's new RoadRunner editor. And so do all popular video games and CAD packages.... 更多内容 >>
Complexity of Computing the Eigenvalues of a Symmetric Matrix 1
I am giving a five-minute talk today, May 26, at the virtual seminar on Complexity of Matrix Computations. Here are my slides. Two new MATLAB functions, tred and imtql, instrumented to count flops, are available in symeig.m.... 更多内容 >>
Computing Eigenvalues of Symmetric Matrices 1
Computing Eigenvalues of Symmetric MatricesSee revision.Get the MATLAB code (requires JavaScript) Published with MATLAB®... 更多内容 >>
Solving Commodious Linear Systems 2
This is about linear systems with fewer equations than variables; A*x = b where the m -by- n matrix A has fewer rows that columns, so m < n . I have always called such systems wide or fat, but this is not respectful. So I consulted the Merriam-Webster Thesaurus and found commodious.... 更多内容 >>
Mount St. Helens and Matrix Rank
What do Mount St. Helens and the rank of a matrix have in common? The answer is the MATLAB function peaks. Let me explain. Please bear with me -- it's a long story.... 更多内容 >>
CR and CAB, Rank Revealing Matrix Factorizations 5
The rank of a linear transformation is a fundamental concept in linear algebra and matrix factorizations are fundamental concepts in numerical linear algebra. Gil Strang's 2020 Vision of Linear Algebra seeks to introduce these notions early in an introductory linear algebra course.... 更多内容 >>
Notes on CR and west0479 4
My post a few days ago, Gil Strang and the CR Matrix Factorization, generated a lot of email. Here is the resulting follow-up to that post.... 更多内容 >>
Gil Strang and the CR Matrix Factorization 4
My friend Gil Strang is known for his lectures from MIT course 18.06, Linear Algebra, which are available on MIT OpenCourseWare. He is now describing a new approach to the subject with a series of videos, A 2020 Vision of Linear Algebra. This vision is featured in a new book, Linear Algebra for Everyone.... 更多内容 >>
Two Dubious Ways to Solve A*X = X*B, part 1 2
Recently, I had email from a student in Italy.... 更多内容 >>