calculating fourier series for the given functions and drawing the curve?

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sina 2014-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/156039-calculating-fourier-series-for-the-given-functions-and-drawing-the-curve

编辑： sina 2014-9-25

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hey guys, one of my friends has just given me a question.I wrote the code for it but don't know how to draw the chart or curve for that,would you please help me out...??thanks

here's the code: clc syms x f=exp(-abs(x)); N=15; 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