三个自变量,一个因变量如何拟合公式?(函数形式未知)。
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请问三个自变量,一个因变量如何拟合公式(函数形式未知)?其中一个自变量的数量级特别小,该如何处理?有没有什么命令把数值带入,就可以给出公式?(x变化范围为0.4/0.5/0.6,y变化范围1.51E-04/2.31E-04/4.57E-04,z变化范围2.5-20)谢谢~

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