trying to plot x(n) = 3cos((2*pi*3*n)/25)

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Dalia Lezzar
Dalia Lezzar 2017-4-12
回答： GianPierre 2023-2-16
matlab beginner here :( I need to lot an equation for some discrete time signals and the sum of thes signals over a range of n

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James Tursa
James Tursa 2017-4-12
E.g.,
n = 0:0.01:10;
x = 3*cos((2*pi*3*n)/25);
plot(n,x)
grid on
xlabel('n')
ylabel('x')
title('x = 3*cos((2*pi*3*n)/25)')

更多回答（1 个）

GianPierre
GianPierre 2023-2-16
a) Señales periódicas. Determine si las siguientes señales son periódicas. En caso afirmativo, especifique su frecuencia fundamental.
i) 𝑥(𝑛) = 2exp[𝑗 ( 𝑛 6 − 𝜋)]
ii) x(𝑛) = cos ( 𝑛 8 ) cos( 𝜋𝑛 8 )
Su Apoyo porfavor

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