Accord.NET 中具有已知固定截距的线性回归

Question

我使用 Accord.NET 计算基于此页面http://accord-framework.net/docs/html/T_Accord_Statistics_Models_Regression_Linear_SimpleLinearRegression.htm的线性回归的斜率和截距

我想设置一个固定的截距值，以便 Accord 仅预测斜率。我可以在 Accord.NET 中做那件事吗？

Dim inp(10), opt(10) As Double
inp = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
opt = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

Dim ols As New OrdinaryLeastSquares
Dim reg As New SimpleLinearRegression

reg.Intercept = 4 'no effect, how can we set the intercept value?
reg = ols.Learn(inp, opt)

Dim hsl As String
hsl = "y=" + reg.Slope.ToString + "X+" + reg.Intercept.ToString

Answer 1

设置ols.UseIntercept = False，将所需的截距值添加到每个opt 值，然后运行ols.Learn()。生成的Slope 将根据您想要的截距进行计算。