How to find uncertainties in the coefficients of polyfit

49 次查看（过去 30 天）
Chris Martin
Chris Martin 2014-11-24
回答： Star Strider 2024-1-4
How to find uncertainties in the coefficients of polyfit

请先登录，再回答此问题。

回答（2 个）

aneps
aneps 2014-11-24
编辑：aneps 2014-11-24
Try this:
[P,S,MU] = polyfit(x,y,N)
[y,DELTA] = polyval(P,x,S,MU) % this will give you the error
Refer: http://www.mathworks.com/help/matlab/ref/polyfit.html http://www.mathworks.com/help/matlab/ref/polyval.html
  2 个评论
Chris Martin
Chris Martin 2014-11-25
actually i need the uncertainty associated with the determination of coefficients, ie i need the uncertainty associated with m, of y=mx+c

请先登录，再进行评论。

Star Strider
Star Strider 2024-1-4
An earlier version of my polyparci function already existed when this question originally posted. It calculates the confidence intervals on each parameter.
I just uploaded a significant upgrade to the original version that now additionally returns the probabilities for each parameter.

类别

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

标签

Community Treasure Hunt

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

Start Hunting!

Translated by