Data fitting using GLM model

6 次查看（过去 30 天）
Jana Ulmanová
Jana Ulmanová 2022-1-4
回答： John D'Errico 2022-1-4
Hello,
I need to fit data with this dependece r(H10,T,P,t)=a0(H10)+a1*t+a2*t^2+ a3*T+a4*P+a5 and I would like to use GLM.
I am struggling with the very beginning. Could you possible give me a hint how to fit data with 4 different dependencies and obtaint a1..a5 ?
Thank you.
  1 个评论
John D'Errico
John D'Errico 2022-1-4
Is A0 a FUNCTION of H10? Or have you forgotten to put a * in there to denote multiplication. Is there a way that we should know this by looking at your question? (NO.)

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

John D'Errico
John D'Errico 2022-1-4
Trivial.
Well, trivil, If we assume that A0(H10) was actually intended as A0*H10.
r(H10,T,P,t)=a0*H10 + a1*t + a2*t^2 + a3*T + a4*P + a5
First, set up a matrix. Assuming you have variables, as COLUMN vectors, for the variables: H10, T, P, t and r.
n = numel(H10);
M = [H10,t,t.*t,T,P,ones(n,1)];
a012345 = M\r;
The vector a012345 will contain the coeffiicients you wish to find.
You could also use tools from the stats toolboix, such as regress, etc.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Descriptive Statistics 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by