Use a cube instead of the Utah Teapot in my previous post. I was pleasantly suprised by the final screen shot.... read more >>
Use a cube instead of the Utah Teapot in my previous post. I was pleasantly suprised by the final screen shot.
ContentsRGB cubeRzRx*RzRz*RxRyTxSxyzAll togetherClippedWhich?RGB cubeThree faces of our cube are colored with red, green and blue. The opposite faces have the complentary colors, cyan, magenta and
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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.... read more >>
From its introduction in 1976 by Martin Newell, then a grad student at the University of Utah, the Teapot has played an import role in the
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四元数是复数的推广,在计算机图形学和许多其他领域都有应用阅读更多>>
四元数是在计算机图形学和许多其他领域发现应用的复数的概括。内容< / p > < a href = " # 8 aaa90c7 - 8166 - 4325 - b670 d71ff40c423a”> Ed天使< / > < a href = " # 744 b6e76 - 6汇集4747 - bae0 d074aecab3e5”>两个维度< / > < a href = " # 74 ca6370 - 28 - e2 - 417 f - bc3c - 5013826 - b6572”>三维< / > < a href = " # 419 ccb86-4cc1-49f1-a4cd-8ef22b090470 " >威廉·罗文汉密尔顿< / > < a href = " # 1 d92ae82 - 9322 - 4521 - bbab - 11 - a54b86c295”>点和交叉s manbetx 845产品< / > < a href = " # a09fb4e2-8d61-42a7-8f38-2c013e056c7c " >四元数< / > < a href = " # 6 c249cb2 - 5 - c3e - 4880 -贝科- 63430 - e62fb44”>四元数增加< / > < a href = " # 3 f7e0caf - 9 - c8c - 448 a - 9316 e94374533e1a”>四元数乘法< / > < a href = " # e91db608 b9c9 - 4 - e5f a7d2 - 89 aded68fd12”>美中不足科学< / > < a href = " # 7 cac949e - 0 - e12汽油- 4 - d48 aa85 - 122 e0ae9b36c”>本考察团< / >
In February and March I published three blog posts about an enhancement request for MATLAB concerning tie breakers with the round function, including the ability to round ties to even. Round One, Round Two and Round Three. Since then, a group of us at MathWorks, organized by my colleague (and academic great-great-grand-descendant) Heiko Weichelt, have been considering the request. We had a virtual design review recently. This post describes a prototype incorporating the features that were discussed at that review.... read more >>
In February and March I published three blog posts about an enhancement request for MATLAB concerning tie breakers with the round function, including the ability to round ties to even. Round One, Round Two and Round Three. Since then, a group of us at MathWorks, organized by my colleague (and academic great-great-grand-descendant) Heiko Weichelt, have been considering the request. We had a virtual design review recently. This post describes a prototype incorporating the features that were discussed at that review.
Contentsroundfloor and ceilTies...read more >>
Nick Higham's Numerical Linear Algebra group at the University of Manchester is hosting a conference celebrating Jack Dongarra's 70th birthday July 7 and 8. I am giving a talk, virtually, on July 7. I plan to reminisce about how I did computing in the days before everybody had their own computer in their lap. Here are the slides for the talk, some notes, and some links to this blog for more details.... read more >>
Nick Higham's Numerical Linear Algebra group at the University of Manchester is hosting a conference celebrating Jack Dongarra's 70th birthday July 7 and 8. I am giving a talk, virtually, on July 7. I plan to reminisce about how I did computing in the days before everybody had their own computer in their lap. Here are the slides for the talk, some notes, and some links to this blog for more details.
These computers that have been a vital part of my professional life.
ContentsCaltech and University of Utah, 1959 and 1960Jet Propulsion Laboratory, 1960 - 1961Used punched cards.Stanford, 1961 - 1965ETH
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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.... read more >>
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.
Contentssymeig_01symeig_02symeig_03symeig_04symeig_05symeig_06symeig_01 imshow('symeig_01.jpg') symeig_02 imshow('symeig_02.jpg') symeig_03 imshow('symeig_03.jpg')...read more >>
Computing Eigenvalues of Symmetric MatricesSee revision.Get the MATLAB code (requires JavaScript) Published with MATLAB®... read more >>
Computing Eigenvalues of Symmetric Matrices
See revision.
Get the MATLAB code (requires JavaScript)
Published with MATLAB®
...read more >>
The Bucky Ball provides an elegant example of a graph, the connectivity of the Buckminster Fuller geodesic dome.We are also demonstrating publishing this blog with the Live Editor. There is a button... read more >>
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这是关于方程少于变量的线性系统A*x=b其中m-by-n矩阵A的行数少于列数,因此m<;n。我总是把这样的系统称为“宽”或“胖”,但这是不礼貌的。因此,我查阅了《韦氏词典》,找到了宽敞的阅读更多>>
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.
This is also one my first posts to use the Live Editor™. Here is a a link to the .mlx file.
ContentsCommodious linear systemsGenerate examplesBackslashPseudoinverseSVDQuestions...read more >>
What do the years 2018, 2029 and 2040 have in common? They are the only years in the 21st century when Easter Sunday occurs on April Fools Day.... read more >>
This plot shows the April Fools Easter Sundays in the 21st century and also shows that Easter can occur on any date between March 22 between April 25.
p = plot(delta,'.'); annotate(p,delta) Easter Day...read more >>