matrix

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python built-in function to do matrix reduction

Does python have a built-in function that converts a matrix into row echelon form (also known a开发者_开发问答s upper triangular)?If you can use sympy, Matrix.rref() can do it:[详细]

2023-04-11 03:52 分类：问答
Performing matrix operations with complex numbers in C

I\'m trying to perform computations involving matrix operations and complex math - sometimes together, in C. I\'m very familiar with Matlab and I know these types of computations could be performed si[详细]

2023-04-11 03:13 分类：问答
Cubic Spline Program

I\'m trying to write a cubic spline interpolation program. I have written the program but, the graph is not coming out correctly. The spline uses natural boundary conditions(second dervative at start/[详细]

2023-04-11 01:41 分类：问答
How do I rotate individual bones in XNA in a model?

I\'m making a game in XNA that is a shooting role-plaing game. I have m开发者_StackOverflowade a human model in Blender and imported it into XNA. I loaded it and can rotate the entire model, but how d[详细]

2023-04-11 01:37 分类：问答
write information into Excel after each loop

I have a 6x7 matrix(A) and some operation I\'m doing on it for k=1:50 (number of loops). I know that in order to write a single matrix in an excel file I need:[详细]

2023-04-10 22:25 分类：问答
calculations between two Multidimensional arrays

I have this code: $id = new matrix(array(0=>array(1,0.5,3), 1=>array(2,1,4), 2=>array(1/3,1/4,1)));[详细]

2023-04-10 19:56 分类：问答
finding nearest positive semi-definite correlation matrix

Is there an R function or DLL that calculates a nearest positive semi-definite correlation matrix? Finding the nearest positive semi-definite matrix is a 开发者_运维问答well-documented common problem[详细]

2023-04-10 17:57 分类：问答
Maxima: Simplify matrix components

in Maxima, how is it possible to simply equations that are components of a matrix? I have a rather b开发者_StackOverflowig matrix and want to simplify the components of it (e.g. factor out and cancel[详细]

2023-04-10 16:13 分类：问答
Finding all possible unique arrays within a matrix

When given a square ma开发者_如何学Gotrix, what would be the best way to find all of the possible arrays within it without using more than one element from any row/column in each array?[详细]

2023-04-10 13:08 分类：问答
Mapping tuple (R, R) into ((R,R),R)?

Input [[0 0 0 0 0] [0 4 0 0 0] [0 1 0 0 0] [0 1 2 0 0] [0 1 2 3 0]] Intended output [[(0, day00) (0, day01) (0, day02) (0, day03) (0, day04)][详细]

2023-04-10 11:02 分类：问答