Ridge Regression Code error message

Dear,

I wrode the following comand for Ridge regression:

X = file name

x = [Crack];

y = FFT;

n = length(y);

c = cvpartition(23,'HoldOut',0.3);

>> idxTrain = training(c,1);

>> idxTest = ~idxTrain;

>> b = ridge(y(idxTrain),X(idxTrain),lambda);

The logical indices contain a true value outside of the array bounds. (I´ve got this message. What´s wrong ?)

Thanks for your support !

Answer 1

[Raunak Gupta]

Hi,

From the code I think the cvpartition that is created should have ‘n’ number of observation instead of 23. That is why the logical vector generated by training has size mismatch compare to X or y. Changing 23 to ‘n’ should work.

[Eduardo Calixto]

Thanks for your support Raunak ! I will try and let you know !

[Fatma HM]

Hi Raunak, I have a questions how can i use the Ridge regression in matlab ? And if i have my inputs and output how will I use them in the code of ridge regression and what it will be the coefficient in ridge regression ? Please help me i can’t figure it out