i want the fourier seris of function:
my code:
clear all
clc
syms x
f=(x+2).*(x>-2)-(x+2).*(x>-1)+(1).*(x<=1)-(1).*(x<=-1)+(2-x).*(x>1)-(2-x).*(x>=2);
N=10;
a_0=(1/pi)*int(f*cos(0*x),-pi,pi)
for n=1:N
a_n(n)=(1/pi)*int(f*cos(n*x),-pi,pi);
b_n(n)=(1/pi)*int(f*sin(n*x),-pi,pi);
end
a_n
b_n
f_new=a_0/2;
for n=1:N
f_new=f_new+a_n(n)*cos(n*x)+b_n(n)*sin(n*x);
end
subs(f_new,x,5)
subs(f,x,5)
the error:
Error using symengine
Invalid integrand.
Error in sym/int (line 162)
rSym = mupadmex('symobj::intdef',f.s,x.s,a.s,b.s,options);
Error in Untitled3 (line 7)
a_0=(1/pi)*int(f*cos(0*x),-pi,pi)
my function:
2 Comments
infinity (view profile)
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https://www.mathworks.com/matlabcentral/answers/469270-fourier-series-of-this-function#comment_719172
HADIMARGO (view profile)
Direct link to this comment
https://www.mathworks.com/matlabcentral/answers/469270-fourier-series-of-this-function#comment_719273
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