Article directory 1. Basic theory 1. System of linear equations 2. Detailed steps of Gauss elimination method 3. Precautions 2. Specific calculation process 1. Use Gauss elimination method to find the LU decomposition of A, and solve the system of equations Ax =b from this a. Perform LU decomposition of A. b. Use LU decomposition […]
Tag: numerical
Why is front-end numerical precision lost? (BigInt solution)
I believe that all front-end partners will inevitably be involved in using JavaScript to process numerical values in their daily work, such as numeric calculations, retaining specified decimal places, interface return values that are too large, etc. These operations are all possible. As a result, originally normal values do behave abnormally in JavaScript (ie, precision […]
The backend asks why the frontend numerical precision is lost?
I believe that all front-end partners will inevitably use JavaScript to process numeric related operations in their daily work, such as numeric calculation strong>, Keep specified decimal places, The value returned by the interface is too large, etc. These operations may cause the original normal value to be displayed in JavaScript code> does behave abnormally […]
Numerical analysis-power method and inverse power method C language
Numerical Analysis Computer Assignment First Question #include <stdio.h> #include <math.h> #include <float.h> double mifa(double A[501][501],double pianyi){<!– –> int i,rows = 501,cols = 501,n = 501,TIMES=0; double U[501],y[501],e = 1e-12,enow = DBL_MAX,beta = DBL_MAX; for (int i = 0; i < n; i + + ) {<!– –> A[i][i] = A[i][i]-pianyi; } //Initialize U to be […]
C++ Standard Templates (STL) – Type Support (Numerical Limits, C Numeric Limits Interface)
C Numerical Limit Interface See std::numeric_limits interface Defined in the header file PTRDIFF_MIN (C++11) The minimum value of std::ptrdiff_t type object (Macro constant) PTRDIFF_MAX (C++11) The maximum value of std::ptrdiff_t type object (Macro constant) SIZE_MAX (C++11) The maximum value of std::size_t type object (Macro constant) SIG_ATOMIC_MIN (C++11) The minimum value of std::sig_atomic_t type object (Macro […]
[Numerical calculation methods] Curve fitting and interpolation: Lagrange interpolation, Newton interpolation and their python/C implementation
Table of Contents 1. Approximate expression Interpolation Fitting Projection 2. Interpolation 1. Lagrange interpolation Lagrange interpolation formula Linear interpolation(n=1) Parabolic interpolation (n=2) python implementation C language implementation 2. Newton interpolation python implementation C language implementation 1. Approximate expression Interpolation, fitting, and projection are common approximate expressions used to estimate, predict, or represent data or functions. […]
Numerical analysis 1–Lagrangian interpolation method
Directory Principle introduction Code Results display Principle introduction 1. Definition 2. Is Ln(x) unique that satisfies the interpolation conditions? Assuming that Ln(x) is a polynomial of degree n, then the following n + 1 equations can be obtained by bringing in the conditions of each interpolation point: We want to prove the uniqueness of Ln(x), […]
C#, numerical calculation – data modeling, calculation method and source program of linear fitting (Fitexy)
1 Text format using System; namespace Legalsoft.Truffer { public class Fitexy { private double a { get; set; } private double b { get; set; } private double siga { get; set; } private double sigb { get; set; } private double chi2 { get; set; } private double q { get; set; } private […]
Nostalgic images and numerical fitting of RGB and HSI color spaces
Written earlier, this is a summary of the explanations about the numerical “XX” course assignments of the “X” course in optics at “XX” University. Jiang Yue looks the same every year, and so does the assignment. I can’t go home during the Mid-Autumn Festival and National Day and have nothing to do, so I decided […]
C#, numerical calculation – calculation method and source program of Poisson Deviance (Poissondev)
1 Text format using System; namespace Legalsoft.Truffer { public class Poissondev : Ran { private double lambda { get; set; } private double sqlam { get; set; } private double loglam { get; set; } private double lamexp { get; set; } private double lambold { get; set; } private double[] logfact { get; set; […]