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: numeric
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 […]
MFC touch screen virtual numeric keyboard idea
These days, I need to use a touch screen in MFC projects. At the beginning, I originally called an external keyboard, but my superiors were reluctant and had to write a simple numeric keyboard myself. I will post the ideas and code below. You still have to create the keyboard interface yourself. I am posting […]
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 […]
java Cannot get a STRING value from a NUMERIC cell error
1. What is the error Cannot get a STRING value from a NUMERIC cell? When using Apache-POI to read an excel file, if the method of obtaining data does not match the actual type, an IllegalStateException error will be thrown, as follows: java.lang.IllegalStateException: Cannot get a STRING value from a NUMERIC cell at org.apache.poi.xssf.usermodel.XSSFCell.typeMismatch(XSSFCell.java:1075) at […]
Solving TypeError: Scalar value for argument color is not numeric
Table of Contents Solve TypeError: Scalar value for argument ‘color’ is not numeric wrong reason Solution 1. Use valid color strings 2. Use valid color abbreviations 3. Use a numerical value between 0 and 1 to represent the color 4. Use RGB tuples to represent colors 5. Use hexadecimal to represent colors in conclusion Application […]
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 […]
Example of front-end sorting of ordinary numeric arrays
1. arr.sort(fn) // Sort in ascending order arr.sort((a, b) => a – b); // Sort in descending order arr.sort((a, b) => b – a); 2. Bubble sort Bubble sort-ascending order principle: eg: [1, 6, 7, 9, 10, 3, 4, 5, 2] 1) First traverse the array for the first time. If the previous number is […]
Lecture 2: C language numeric types and variables
Introduction: The areas in boldare the more important content, and the ones marked in red are the most important ones. At the same time, I will also provide examples for more important or complex knowledge points To help you understand, you can focus on the key points when reviewing for the exam, which will save […]
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 […]