How to define a function with a summation
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Hello,
I'm fairly new to matlab so I'm not too familiar with the way all of the functions work. I need to plot a function I have been given :
but I am having trouble defining it. I've tried the following:
syms k x
f = matlabFunction(b0 + symsum(a(k)*sin(k*x) + b(k)*cos(k*x)));
This gives me an error stating "Invalid indexing or function definition. Indexing must follow MATLAB indexing. Function arguments must be symbolic variables, and function body must be sym expression."
Can someone help me out? :)
1 个评论
Sahil
2022-9-18
syms k x f = matlabFunction(b0 + symsum(a(k)*sin(k*x) + b(k)*cos(k*x)));
采纳的回答
An efficient implementation would be,
a=___;
b=___;
b0=___;
fplot(@(z) myFourier(z,a,b,b0));
function f=myFourier(x,a,b,b0)
n=numel(a);
arg=x(:).*(1:n);
f=b0+sin(arg)*a(:)+cos(arg)*b(:);
f=reshape(f,size(x));
end
3 个评论
Rozalia Korycka
2019-5-30
编辑：Rozalia Korycka
2019-5-30
Matt J
2019-5-30
I'm baffled by the warnings. The function is vectorized as fplot requires.
Rozalia Korycka
2019-5-30
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