Mark poly modules as beta in pyfaust/matfaust doc.

wrapper/matlab/+matfaust/+poly/invm_multiply.m

@@ -89,7 +89,7 @@ function AinvB = invm_multiply(A, B, varargin)
 	b_ = eigs(B_, 1);
 	a = b-b_;
 	if(a <= 0)
-		error('A is a singular matrix or its spectrum contains negative values')
+		error('a <= 0, A is a singular matrix or its spectrum contains negative values')
 	end
 	m = (a + b) / 2;
 	c = (b - a) / (b + a);

wrapper/matlab/+matfaust/+poly/poly.m

 % experimental block start
 %> @package matfaust.poly @brief The matfaust module for polynomial basis as Faust objects.
+%> @note This module is still in BETA status.
 
 %======================================================================
 %> @brief Computes the linear combination of the polynomials defined by basis.

wrapper/python/pyfaust/poly.py

@@ -2,6 +2,7 @@
 # @PYFAUST_LICENSE_HEADER@
 
 ## @package pyfaust.poly @brief The pyfaust module for polynomial basis as Faust objects.
+## @note This module is still in BETA status.
 
 import _FaustCorePy
 import scipy.sparse as sp
@@ -629,7 +630,7 @@ def invm_multiply(A, B, rel_err=1e-6, tradeoff='time', max_K=np.inf, dev='cpu',
     b_ = eigsh(B_,1, return_eigenvectors=False)[0]
     a = b-b_
     if a <= 0:
-        raise Exception("A is a singular matrix or its spectrum contains"
+        raise Exception("a <= 0 error: A is a singular matrix or its spectrum contains"
                         " negative values.")
     m = (a + b) /2
     c = (b - a) / (b + a)