MATLAB Answers

cubic spline regression and plot

18 views (last 30 days)
ektor
ektor on 28 Jan 2019
Answered: Image Analyst on 28 Jan 2019
Dear all,
I have two variables X and Y.
X and Y are both vectors of dimension 8561X1
For example:
X=[ 1
1
1
1
1
5
1];
Y=[ 34200
34201
34202
34203
34204
34205
34210]
I want to regress X on Y using a cubic spline specification and then take the ratio X/, where , is the fitted values obtained from the cubic spline regression
And I want to place the knots at specific positions, eg, 2nd and 5th position.
I found the rcspline package and I did something like
[bhat f sse knots]=rcspline(X,y,knots);
but I am not sure how to address the knots's position.
Any help is greatly appreciated.
Thanks,

  0 Comments

Sign in to comment.

Accepted Answer

Image Analyst
Image Analyst on 28 Jan 2019
I don't know about the ratio stuff but you can adapt my cubic spline demo (attached).

  0 Comments

Sign in to comment.

More Answers (1)

ektor
ektor on 28 Jan 2019
Any help?

  0 Comments

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!

Translated by