How do I use regress function with 6 input variables?
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Hi,
I have 6 input variable in my function, following the example by matlab i did the next code:
y=A(1:38,:);
v=A(39:76,:);
d=A(77:114,:);
vi=A(115:152,:);
v2=v.^2;
v3=v.^3;
v4=v.^4;
X = [ones(size(v)) v2 v3 v4 d vi];
b = regress(y,X);
y is a matrix 38*25 and X 38*150
but, i have the next error:
Y must be a vector and must have the same number of rows as X.
I don't know how do column vectors... Anybody knows?
I see that rows of X have to be the number of elements of matrix y.
Thanks.
采纳的回答
Walter Roberson
2020-11-6
0 个投票
You cannot do that with regress(). regress() requires that y be a vector of target responses, one response for each row of x. Each row of x is a multi-dimensional point that has (conceptually) been put through a function that produces a scalar -- 
and y must be the result.
and y must be the result.If your 38*25 y is conceptually the result of putting the input points through 25 different functions, then you need to loop over the columns of y.
2 个评论
Marc Gironella
2020-11-6
Walter Roberson
2020-11-6
编辑：Walter Roberson
2020-11-6
a0_6 = [v(:).^0, v(:).^1, v(:).^2, v(:).^3, v(:).^4, d(:), vi(:)] \ y(:);
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