creaing a loop with symbols

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

thanks,

Mel

Answer 1

[Walter Roberson]

poly2sym()

[Melissa]

brilliant! thank you :). Do you know by chance how I can apply this to each row in the stored coeffs?