Fitting a non-linear model to my data
显示 更早的评论
Hello,
I need to fit a function to my data. I tried it with multiple regression, but it didn't work.
Since the result needs to be 0, if one of the variables is 0, my idea is to do a multiplication of them and find the ideal exponents.
So it would look like this: y = x1^a * x2^b * x3^c * x4^d
Is there any way to find the ideal a, b, c and d if i have the xi and y?
Thanks in advance
采纳的回答
Jeff Miller
2019-12-1
1 个投票
Take logs and use multiple regression. That is, fit the model
log(y) = a log(x1) + b log(x2) etc
This will give you the best a, b, c, and d values for a least-squares fit in this log representation
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Linear and Nonlinear Regression 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
