From 22818a539c37198cd8d9f36b31d4b37a50b8f7c7 Mon Sep 17 00:00:00 2001
From: Jiri Pittner <jiri@pittnerovi.com>
Date: Tue, 3 Feb 2026 17:21:04 +0100
Subject: [PATCH] semisparsemat ostream output

---
 sparsemat.h | 11 +++++++++--
 t.cc        |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/sparsemat.h b/sparsemat.h
index 3542a0b..3bc5c8a 100644
--- a/sparsemat.h
+++ b/sparsemat.h
@@ -326,10 +326,9 @@ return *this;
 template <typename T>
 class SemiSparseMat {
 	friend class NRMat<T>;
-protected:
+public:
 	NRVec<T> diagonal;
 	SparseMat<T> offdiagonal;
-public:
         SemiSparseMat() {};
         SemiSparseMat(const SPMatindex n, const SPMatindex m) : offdiagonal(n,m) {if(n==m) diagonal.resize(n);};
         SPMatindex nrows() const {return offdiagonal.nrows();}
@@ -361,6 +360,14 @@ public:
 	void resize(const SPMatindex n, const SPMatindex m) {offdiagonal.resize(n,m); diagonal.resize(n==m?n:0);}
 };
 
+template <class T>
+std::ostream& operator<<(std::ostream &s, const SemiSparseMat<T> &x)
+                {
+		s << "diagonal= "<<x.diagonal;
+		s << "offdiagonal= "<<x.offdiagonal;
+                return s;
+                }
+
 
 }//namespace
 #endif
diff --git a/t.cc b/t.cc
index d72edd6..00e1cf8 100644
--- a/t.cc
+++ b/t.cc
@@ -4639,6 +4639,7 @@ davidson(aa,r,(NRVec<double> *)NULL,"eivecs",m,1,1e-5,0,300,300);
 cout <<r;
 if(n<=20)
 	{
+	cout<<aa;
 	NRMat a(aa);
 	NRVec<double> b(n);
 	cout <<a;