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Matrix Transpose and matrix multiplication

Preface The reason for writing this blog is to record the implementation code for matrix transpose and matrix multiplication, for future contingencies. The direct reason is that tonight (2016.09.13) participated in the Baidu 2017 school recruit's written test (C + + post), there is a matrix transpose after the online programming problem. In view of the future wr

Linear algebra: Fifth chapter The eigenvalues of the inner product matrices of the similarity matrix and the two-second vector (1) and the similarity matrix _ linear algebra of eigenvectors

The inner product of the first section of a vector. Mathematical Concepts 1. Inner product: With n-dimensional vector Make It is called [X,y] as the inner product of the vector x and Y. 2. Norm: A norm (or length) called a vector x. 3. Unit vector: The vector x is called the unit vector. 4. When, when, said is the angle between the vector x and Y. 5. Orthogonal vector group: refers to a group of 22 orthogonal unit vectors. 6. Standard orthogonal Base: The n-dimensional vector is a base of the

Further Thoughts on Matrix matrix Matrix)

Further Thoughts on the hacker Empire (repost)Posted from the first class of the wheat course. Original: BeckhamWithout a good understanding of the new theory of matrix, it would be a waste of time to watch this play.IntroductionAfter reading Matrix Reloaded, many of the suspense in it has aroused confusion and thinking. A layer of theory (Computer Virtual matrix

Understanding Matrix (Read Csdn Meng understanding matrix) _ Photos

A few months ago, I happened to see Meng's blog, and after reading it, unlike a deeper understanding of the matrix. Now let's summarize and share. "According to current international standards, linear algebra is expressed by axiomatic, it is the second generation mathematical model, ..., which brings about teaching difficulties." "In fact, when we started to learn linear algebra, unknowingly entered the" second-generation Mathematical model "category

Matrix derivation of the Fibonacci series (you can give up the matrix if you cannot understand it) and the Fibonacci Matrix

Matrix derivation of the Fibonacci series (you can give up the matrix if you cannot understand it) and the Fibonacci Matrix I. Matrix Multiplication Set the matrix A and B to meet the following requirements: the number of columns of A = the number of rows of B Calculation ru

R language data structure--2 matrix and data frame ① matrix-matrix

Matrix-matrix-2018 June 9Today is a pity, not too much to learn R language (mainly because to listen to party lecture, learned the party important speech, so no reading), so today summed up a matrix bar. But more study.First of all, a little review of yesterday's factor, the first thing to remember is mode () look at each element, class () see what is the whole,

Android ColorMatrix brightness matrix contrast matrix black and white matrix

The color matrix M is a matrix of 5*4, and the color matrix m in android is stored in a one-dimensional array m=[a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t] way.Each line of the matrix is:R[a b c D E]G[f G h i j]B[k l m N O]A[p Q R S t]The RGBA value of the image is stored in a 5*1 color component

Sparse Matrix and sparse matrix compression storage, Matrix

Sparse Matrix and sparse matrix compression storage, Matrix The unprocessed sparse matrix is actually a special two-dimensional array. Most elements in the array are 0 or other types of illegal values, and there are only a few non-zero elements. To achieve compression and storage, only non-zero elements of the sparse

Android ColorMatrix brightness matrix contrast matrix black/white Matrix

Android ColorMatrix brightness matrix contrast matrix black/white Matrix Color matrix M is a 5*4 matrix. In android, the color matrix M is a one-dimensional array m = [a, B, c, d, e, f, g, h, I, j, k, l, m, n, o, p, q, r, s, t] st

Model matrix, view matrix, projection matrix

The role of a model view projection matrix is to transform vertices from a local coordinate system into a canonical cube (Canonical view volnme). In summary, the model view projection matrix = projection matrix x view matrix X model matrix, the model

Prints the matrix clockwise, given the number of matrix rows and matrix columns (starting at 0)

//Stone 2016/3/21:38:32#include #includeusing namespacestd;classSolution { Public: voidPrintmatrix (vectorint> > matrix) { intCount =0; if(Matrix.empty ())return; intUpedge =0; intLeftedge =0; intRightedge = matrix[0].size (); intDownedge =matrix.size (); BOOLEnd =false; CharDirection ='R'; inti =0; intj =0; while(!end) { Switch(direction) { Case 'R': if(J Rightedge) {

Hdu_4965 Fast Matrix Calculation 2014 multi-School 9 matrix Rapid power + witty matrix combination Law

At first, I thought this question was a raw question about the rapid power of the matrix, Later it was found that it would time out, and the super would exceed M = C ^ (N * n). This operation, and the C itself is a matrix of N * n, with N at the maximum of 1000. But here is a clever place: the source of C is actually = a * B. A is a matrix of N * k, and B is a

Path in the backtracking matrix in the path __ matrix

Topic: Please design a function to determine whether there is a path in a matrix that contains all the characters of a string. The path can start from any grid in the matrix, and each step can move one grid to the left, right, top, and bottom in the middle of the matrix. If a path passes through one of the squares of the matr

PHP implementation of the Serpentine matrix, loopback matrix and digital spiral matrix of the method of graphic explanation

This article mainly introduces the method of implementing the Serpentine matrix, the loopback matrix and the digital spiral matrix in PHP, and analyzes the concept of the Serpentine matrix, the loopback matrix and the digital spiral matr

Android ColorMatrix brightness matrix contrast matrix black/white matrix, androidcolormatrix

Android ColorMatrix brightness matrix contrast matrix black/white matrix, androidcolormatrix Color matrix M is a 5*4 matrix. In android, the color matrix M is a one-dimensional array m = [a, B, c, d, e, f, g, h, I, j, k, l, m, n,

[C + +] leetcode:110 Spiral Matrix II (Spiral write matrix)

Topic:Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.For example,Given N = 3 ,You should return the following matrix:[[1, 2, 3], [8, 9, 4], [7, 6, 5]]idea: The problem is the same as the spiral matrix model and solution. We are asked to write the 1~n^2 number into the matrix

Hdu4965--fast matrix calculation (Fast Matrix power optimization)

Problem DescriptionOne day, Alice and Bob felt bored again, Bob knows Alice was a girl who loves math and are just learning something about mat Rix, so he decided-make a crazy problem for her. Bob has a six-faced dice which have numbers 0, 1, 2, 3, 4 and 5 on each face. At first, he'll choose a number N (4 Step 1:calculate a new n*n matrix C = a*b.Step 2:calculate M = c^ (n*n).Step 3:for each element x in M, calculate x% 6. All the remainders form a

POJ 3318-matrix multiplication (compression matrix with O (n^2) method to find matrix equality)

Title Address: POJ 3318Test instructions: There are 3 n*n matrix a,b,c, q AB is equal to C.Idea: The topic description is very simple, is to use matrix multiplication, but it is obvious that the time complexity of matrix multiplication is O (n^3), obviously timed out. How does that improve? is to use the compression matrix

Matrix and transformation, as well as the use of the matrix in DirectX and OpenGL: Left multiplication/right multiplication, row precedence/column precedence ,...

(1) first, regardless of DX or OpenGL, the vectors and matrices expressed are defined according to the standard in Linear Algebra:"The product of matrix A and B the element C (ij) in column J of row I of matrix C is equal to the sum of the product of the corresponding elements in column J of row I of." (Practical mathematics manual, Science Press, Second Edition)For example, C12 = A11 * B11 + A12 * B21 + A1

Code interview guide for Programmers eighth chapter array and matrix problems circle print matrix

Topic转圈打印矩阵Java codePackage com.lizhouwei.chapter8;/** * @Description: Circular print Matrix * @Author: Lizhouwei * @CreateDate: 2018/4/28 21:52 * @Modify by : * @ModifyDate: */public class Chapter8_1 {public void Printmatrix (int[][] matrix) {int TR = 0; int TC = 0; int DR = matrix.length-1; int DC = matrix[0].length-1; whi

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