70 lines
2.1 KiB
C#
70 lines
2.1 KiB
C#
namespace Cryville.Common.Math {
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/// <summary>
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/// Represents a column vector of vector type <typeparamref name="T" />.
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/// </summary>
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/// <typeparam name="T">The vector type of the elements.</typeparam>
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public class ColumnVector<T> {
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readonly T[] content;
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/// <summary>
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/// The size of the vector.
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/// </summary>
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public int Size {
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get;
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private set;
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}
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/// <summary>
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/// Creates a column vector with specified size.
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/// </summary>
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/// <param name="size">The size of the vector.</param>
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public ColumnVector(int size) {
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content = new T[size];
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Size = size;
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}
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/// <summary>
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/// Creates a column vector from an array.
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/// </summary>
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/// <param name="c">The array.</param>
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public ColumnVector(T[] c) {
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Size = c.Length;
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content = c;
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}
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/// <summary>
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/// Gets or sets the element at the specified index.
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/// </summary>
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/// <param name="i">The zero-based index of the element to get or set.</param>
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/// <returns>The element at the specified index.</returns>
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public T this[int i] {
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get {
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return content[i];
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}
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set {
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content[i] = value;
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}
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}
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/// <summary>
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/// Performs dot operation with a <see cref="System.Single" /> column vector.
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/// </summary>
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/// <param name="lhs">The lefthand column vector.</param>
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/// <param name="o">The vector operator.</param>
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/// <returns>The result of the dot operation.</returns>
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public T Dot(ColumnVector<float> lhs, IVectorOperator<T> o) {
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T res = default(T);
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for (var i = 0; i < Size; i++)
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res = o.Add(res, o.ScalarMultiply(lhs[i], content[i]));
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return res;
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}
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/// <summary>
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/// Creates a <see cref="System.Single" /> column vector and fills it with polynomial coefficients.
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/// </summary>
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/// <param name="size">The size of the column vector.</param>
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/// <param name="num">The base number.</param>
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/// <returns>A <see cref="System.Single" /> column vector filled with polynomial coefficients.</returns>
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public static ColumnVector<float> WithPolynomialCoefficients(int size, float num) {
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var m = new ColumnVector<float>(size);
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for (var i = 0; i < size; i++)
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m[i] = (float)System.Math.Pow(num, i);
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return m;
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}
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}
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}
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