Ridge Regression Code error message

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Eduardo Calixto
Eduardo Calixto 2020-4-23
编辑： Fatma HM 2020-12-1
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 !

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回答（1 个）

Raunak Gupta
Raunak Gupta 2020-4-28
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.
  2 个评论
Eduardo Calixto
Eduardo Calixto 2020-5-2
Thanks for your support Raunak ! I will try and let you know !
Fatma HM
Fatma HM 2020-12-1
编辑：Fatma HM 2020-12-1
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

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