initial transfer fucntion section content

murrayrm · murrayrm · commit 2bd2bf4b8d3b · 2025-02-02T20:39:22.000-08:00
diff --git a/control/xferfcn.py b/control/xferfcn.py
@@ -306,6 +306,16 @@ def __init__(self, *args, **kwargs):
     #: :meta hide-value:
     noutputs = 1
 
+    #: Numerator polynomial coefficients as a 2D array of 1D coefficents.
+    #:
+    #: :meta hide-value:
+    num_array = None
+
+    #: Denominator polynomial coefficients as a 2D array of 1D coefficents.
+    #:
+    #: :meta hide-value:
+    den_array = None
+
     # Numerator and denominator as lists of lists of lists
     @property
     def num_list(self):
diff --git a/doc/xferfcn.rst b/doc/xferfcn.rst
@@ -4,22 +4,45 @@ Frequency domain analysis and design
 Transfer function properties
 ----------------------------
 
+The following basic attributes and methods are available for
+:class:`StateSpace` objects:
+
+.. autosummary::
+
+   ~StateSpace.num_array
+   ~StateSpace.den_array
+   ~StateSpace.shape
+   ~StateSpace.poles
+   ~StateSpace.zeros
+   ~StateSpace.dcgain
+   ~StateSpace.sample
+   ~StateSpace.returnScipySignalLTI
+
+A complete list of attributes, methods, and properties is available in
+the :class:`~control.StateSpace` class documentation.
+
+
 Frequency domain methods
 ------------------------
 
+
 Input/output norms
 ------------------
 
+
 Stability margins
 -----------------
 
+
 Frequency domain synthesis
 --------------------------
 
+
 Transfer functions from data
 ----------------------------
 
 .. todo:: rename to match FBS2e termincology
 
+
 Systems with time delays
 ------------------------
