Set outer extrapolated values to 1e-9 instead of NaN in make_logspaced_from_linear method of Spectrum class.

Author: krisvanneste

sourcespec/spectrum.py

@@ -443,8 +443,8 @@ def make_logspaced_from_linear(self, which='data'):
         )
         # Avoid extrapolation of outer values if there are no NaN values
         if nan_idxs.size == 0:
-            data_logspaced[self.freq_logspaced < freq[0]] = np.nan
-            data_logspaced[self.freq_logspaced > freq[-1]] = np.nan
+            data_logspaced[self.freq_logspaced < freq[0]] = 1e-9
+            data_logspaced[self.freq_logspaced > freq[-1]] = 1e-9
         if which == 'data':
             self.data_logspaced = data_logspaced
         else: