Add log option to plot_iir_filter_analysis()

applications/lofar2/model/pfb_os/dsp.py

@@ -339,7 +339,7 @@ def plot_time_response(h, name='', markers=False):
     plt.grid(True)
 
 
-def plot_iir_filter_analysis(b, a, fs=1, whole=False, Ntime=100, step=False, show=[]):
+def plot_iir_filter_analysis(b, a, fs=1, whole=False, Ntime=100, step=False, log=False, show=[]):
     """Plot and print iir filter analysis results.
 
     Input:
@@ -362,6 +362,8 @@ def plot_iir_filter_analysis(b, a, fs=1, whole=False, Ntime=100, step=False, sho
         z, p, k = dsp_fpga_lib.zplane(b, a, plt_ax=ax1)  # uses np.roots(a), np.roots(b)
     else:
         z, p, k = dsp_fpga_lib.zplane(b, a)  # no plot, only calculate z, p, k
+
+    if log:
         print('Zeros, poles and gain from b, a coefficients:')
         if len(z) > 0:
             print('. zeros:')