plot 2D array using imagesc ?

2022 5 17
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更新时间：2022 5 17
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how to be like him plot 2D array using imagesc?
%The number of sample in the signal
N=640;
n=0:N-1;
fo=1/640;
%The signal x whose amplitude exceeds the range [-pi,pi]
x=5*sin(2*pi*fo*n);
plot(x);
xlabel('Sample index')
ylabel('Original phase in radians')
axis([-50 710 -5.6 5.6])
title('The signal x whose amplitude exceeds the range [-\pi,\pi]')
figure, plot(x)
xlabel('Sample index')
ylabel('Unwrapped phase in radians')
axis([-50 710 -5.6 5.6])
title('The unwrapped phase')
x = 5*sin(2*pi*fo*n);
imagesc(x)
colorbar

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