MATLAB: How to plot a periodic signal f(t)= t.^3 , -pi<=t

periodic signals

f(t)= t.^3 , -pi<=t<pi over interval -2*pi<=t<=2*pi

Best Answer

x = linspace(-2*pi,2*pi,1000);
y = (mod(x+pi,2*pi)-pi).^3;
plot(x,y)

Related Solutions

MATLAB: Hi how can id do this plot f = 5sin⁡(10pi*t) over one period

>> N = 200;
>> t = linspace(0,2/10,N);
>> v = 5*sin(10*pi*t);
>> plot(t,v)

creates this:

MATLAB: Sinc(pi) doesn’t give zero

Since pi is an irrational number and cannot be represented exactly by a finite number of binary digits, there is always going to be an infintesimal error assocated with doing math with irrational numbers (really, there is always an error doing arithmetic on a computer). If you really want it to be zero you can compare it to a tolerance and say that any number smaller than your tolerance is set to zero. For example:

tol = 1e-15;
z = sin(pi);
if abs(z) < tol
    z = 0;
end

Alternatively, you could use

round
round(sin(pi),15)

will return 0

Best Answer

Related Solutions

MATLAB: Hi how can id do this plot f = 5sin⁡(10pi*t) over one period

MATLAB: Sinc(pi) doesn’t give zero

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