Requires a vector second input argument.

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Ashkan Rigi 2021-10-29

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https://ww2.mathworks.cn/matlabcentral/answers/1575008-requires-a-vector-second-input-argument

评论： Matt J 2021-10-29

hi. I run the code below and got the error " Requires a vector second input argument."

t=0:.1:pi;
y=sin(t);
modelfun = @(b,x)(b(1).*x.^3+b(2).*x.^2+b(3).*x+b(4));
b = [-.161;1;1;1];
y = modelfun(b,x) + normrnd(0,0.1,32,1);
beta0 = [2;2;2];
beta = @(predictor,response)nlinfit(predictor,response,modelfun,beta0)
ci = bootci(1000,beta,t,y)

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Matt J 2021-10-29

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That's not the error that I get:

t=0:.1:pi;
y=sin(t);
modelfun = @(b,x)(b(1).*x.^3+b(2).*x.^2+b(3).*x+b(4));
b = [-.161;1;1;1];
y = modelfun(b,x) + normrnd(0,0.1,32,1);
Unrecognized function or variable 'x'.
beta0 = [2;2;2];
beta = @(predictor,response)nlinfit(predictor,response,modelfun,beta0)
ci = bootci(1000,beta,t,y)