86 lines
2.9 KiB
C#
86 lines
2.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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public static class ElementWiseOperations
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{
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private static readonly Dictionary<string, Func<double, double, double>> operations =
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new Dictionary<string, Func<double, double, double>> {
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{ "add", (a, b) => a + b },
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{ "sub", (a, b) => a - b },
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{ "mul", (a, b) => a * b },
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{ "div", (a, b) => a / b },
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{ "pow", (a, b) => Math.Pow(a, b) }
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};
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private static readonly Func<double, double, double> nothing = (a, b) => a;
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public static double[,] DoOperation(this double[,] m, string name, double[,] other) =>
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DoOperation(m, operations.TryGetValue(name, out var operation) ? operation : nothing, other);
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public static double[,] DoOperation(this double[,] m, Func<double, double, double> operation, double[,] other) {
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if (m == null || other == null) throw new ArgumentNullException();
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int rows = m.GetLength(0), columns = m.GetLength(1);
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if (rows != other.GetLength(0) || columns != other.GetLength(1)) {
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throw new ArgumentException("Matrices have different dimensions.");
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}
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double[,] result = new double[rows, columns];
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for (int r = 0; r < rows; r++) {
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for (int c = 0; c < columns; c++) {
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result[r, c] = operation(m[r, c], other[r, c]);
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}
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}
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return result;
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}
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public static double[,] DoOperation(this double[,] m, string name, double number) =>
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DoOperation(m, operations.TryGetValue(name, out var operation) ? operation : nothing, number);
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public static double[,] DoOperation(this double[,] m, Func<double, double, double> operation, double number) {
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if (m == null) throw new ArgumentNullException();
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int rows = m.GetLength(0), columns = m.GetLength(1);
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double[,] result = new double[rows, columns];
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for (int r = 0; r < rows; r++) {
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for (int c = 0; c < columns; c++) {
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result[r, c] = operation(m[r, c], number);
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}
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}
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return result;
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}
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public static void Print(this double[,] m) {
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if (m == null) throw new ArgumentNullException();
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int rows = m.GetLength(0), columns = m.GetLength(1);
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for (int r = 0; r < rows; r++) {
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Console.WriteLine("[ " + string.Join(", ", Enumerable.Range(0, columns).Select(c => m[r, c])) + " ]");
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}
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}
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}
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public class Program
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{
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public static void Main() {
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double[,] matrix = {
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{ 1, 2, 3, 4 },
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{ 5, 6, 7, 8 },
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{ 9, 10, 11, 12 }
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};
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double[,] tens = {
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{ 10, 10, 10, 10 },
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{ 20, 20, 20, 20 },
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{ 30, 30, 30, 30 }
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};
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matrix.Print();
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WriteLine();
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(matrix = matrix.DoOperation("add", tens)).Print();
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WriteLine();
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matrix.DoOperation((a, b) => b - a, 100).Print();
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}
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}
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