I hope to use enough points and show only a few repetitions to make a smooth graph.

Plot the sinusoid 2*cos(2*pi*1500*t+pi/2), starting at t=0 seconds.

I want to use enough points and show only a few repetitions to make a smooth graph.

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thanks for ur kindness

Answer 1

[Voss]

% cos(t) has period 2*pi
% cos(2*pi*t) has period 1
% cos(2*pi*1500*t) has period 1/1500
%
% pick t values that span a few periods
% (i.e., a few multiples of 1/1500):
% 
% 500 points, starting with 0, ending with 5/1500:
t = linspace(0,5/1500,500);

x = 2*cos(2*pi*1500*t+pi/2);
plot(t,x);
xlabel('t');

[Changhyun Kim]

thank you for ur kindness

[Voss]

You're welcome!