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dodo920306 · Jun 3, 2024 · 9881fec · 9881fec
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diff --git a/README.md b/README.md
diff --git a/c6_p28_a.m b/c6_p28_a.m
@@ -0,0 +1,3 @@
+x = ones(1, 13);
+X = fft(x)
+stem(0:12, abs(X))
diff --git a/c6_p28_b.m b/c6_p28_b.m
@@ -0,0 +1,3 @@
+x = 0:10;
+X = fft(x)
+stem(x, abs(X))
diff --git a/c6_p28_c.m b/c6_p28_c.m
@@ -0,0 +1,4 @@
+x = 1 ./ (0:10);
+x(1) = 1;
+X = fft(x)
+stem(0:10, abs(X))
diff --git a/c6_p28_d.m b/c6_p28_d.m
@@ -0,0 +1,3 @@
+x = (0:10) .* (0.8 .^ (0:10));
+X = fft(x)
+stem(0:10, abs(X))
diff --git a/c6_p29.m b/c6_p29.m
@@ -0,0 +1,6 @@
+a = 0.75;
+Omega = 0:0.01:6.3;
+X = (1 - a ^ 2) ./ (1 - 2 * a * cos(Omega) + a ^ 2);
+plot(Omega, abs(X));
+xlabel('\Omega')
+ylabel('X(\Omega)')
diff --git a/c6_p30.m b/c6_p30.m
@@ -0,0 +1,3 @@
+x = [1 2 0 -1 -2 1 5 4];
+X = fft(x)
+stem(abs(X))