在Visual C＃中查找两个数组之间的插值 [英] Find Interpolation Value Between Two Arrays in Visual C#

问题描述

我想使用任何数学方法找到插值;线性，2D或更复杂。



我有两个根类型，它们有双重类型元素;第一个是X数组，下一个是Y数组。 

每个X数组的元素对应于Y数组的元素。像这样：



双倍[] X = {1.2,4.5,23,86};

double [] Y = {19,75,123,344};
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作为一个例子，我想知道Y数组中"10"的值是多少。要在X数组中表示的值。



请帮助我，谢谢。

解决方案

< blockquote>

从这个简单的方法开始：

 double x = 10; 
 int i = Array.FindIndex（X，k => x< = k）; 
 double y = Y [i  -  1] +（x  -  X [i  -  1]）*（Y [i]  -  Y [i  -  1]）/（X [i]  -  X [i  -  1 ]）; 

I want to find an interpolation value using any math method; linear, 2D or more complex.

I have two root arrays which have double type elements; the first one is X array and the next one is Y array. 

The element of each X array corresponds to an element of Y array. Like this:

double [] X = {1.2,4.5,23,86};

double [] Y = {19,75,123,344};

As an example, I would like to find out what value will be in the Y array for "10" value to be represented in the X array.

Please help me, thanks.

解决方案

Start with this simple method:

double x = 10;
int i = Array.FindIndex( X, k => x <= k );
double y = Y[i - 1] + ( x - X[i - 1] ) * ( Y[i] - Y[i - 1] ) / ( X[i] - X[i - 1] );

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