add variables to control cycle resolution and count

reverse_goertzel.py

@@ -28,16 +28,18 @@ def sinusoid(n, cycles=1):
     return result
 
 def main():
-    cycles = 2
-    signal = goertzel_sinusoid(cycles, 1, 1024, 1)
-    reference = np.array(sinusoid(1024, cycles))
+    samp_per_cycle = 512
+    cycles = 3
+    len = cycles * samp_per_cycle
+    signal = goertzel_sinusoid(1, cycles, samp_per_cycle, 1)
+    reference = np.array(sinusoid(len, cycles))
     error = reference - signal
     print("max error:", error.max())
-    x = np.array(range(0, 1024))
+    x = np.array(range(0, len))
     plt.plot(x, signal)
     plt.plot(x, reference)
     plt.plot(x, error)
-    #plt.plot(x, error*1000/3)
+    #plt.plot(x, error*100)
     plt.show()
 
 if __name__ == "__main__":