matrix_operation.m

matlab 源程序

clear;
%a fast way to generate a matrix by multiplying a column vector by a row
%vector
X = 1:5;
M = X'*X;
M

%generate a complex signal
t = 0:1e-3:10;
z = exp(-2*i*pi*t);

%x and y are the real and imaginary part of z
x =real(z);
y = imag(z);
figure(2);
plot(t, x);
hold on;    grid on;
plot(t, y, 'r');
legend('real part', 'imaginary part');

%rho and theta are the magnitude and phase of z
rho = abs(z);
theta = angle(z);
figure(3);
plot(t, rho);
hold on;    grid on;
plot(t, theta, 'r');
legend('magnitude', 'phase');

%z_conj is the conjugate of z
z_conj = conj(z);
figure(4);
plot(t, z+z_conj-2*x);
hold on;    grid on;
plot(t, z-z_conj-2*i*y,'r');
legend('difference in (z+z_conj-2real)', 'difference in (z-z_conj-2j imag)');