creaing a loop with symbols

Question

Melissa 2013-12-2

0
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https://ww2.mathworks.cn/matlabcentral/answers/108297-creaing-a-loop-with-symbols

评论： Melissa 2013-12-2

Good Morning All,

I am trying to make a loop using the sym function. Given the information for a spline interpolation (mmkp function) more specifically the coefficients I want the polynomial as a function. Since the spline is given as order 4 per break, I would have a matrix of [nx1]. So the function would be coefficients(1,1)*x^3+coefficients(1,2)*x^2+coefficients(1,3)*x+coefficients(1,4)+....

%So I have the coefficient information from spline as:
coefs=pp.coefs;
%Creating matrix of x using sym
sym_x=sym('x',[length(coefs),4);
fx=coefs*sym_x;
for i=1:length(coefs)
f(i)=fx(1,n)^3+fx(2,n)^2+fx(3,n)+fx(4,n)
f(i+1)=f(i)+f(i+1)
end