Migration from SVN

eo/src/es/matrices.h

@@ -0,0 +1,45 @@
+#ifndef MATRICES_H
+#define MATRICES_H
+
+#include <vector>
+
+/** @ingroup Utilities
+ */
+class lower_triangular_matrix {
+
+    unsigned n;
+    std::vector<double> data;
+
+    public:
+
+    lower_triangular_matrix(unsigned n_ = 0) : n(n_), data(n * (n+1) / 2) {};
+
+    void resize(unsigned n_) {
+        n = n_;
+        data.resize(n*(n+1)/2);
+    }
+
+    std::vector<double>::iterator operator[](unsigned i) { return data.begin() + i * (i+1) / 2; }
+    std::vector<double>::const_iterator operator[](unsigned i) const { return data.begin() + i*(i+1)/2; }
+};
+
+/** @ingroup Utilities
+ */
+class square_matrix {
+    unsigned n;
+    std::vector<double> data;
+
+    public:
+
+    square_matrix(unsigned n_ = 0) : n(n_), data(n * n) {};
+
+    void resize(unsigned n_) {
+        n = n_;
+        data.resize(n*n);
+    }
+
+    std::vector<double>::iterator operator[](unsigned i) { return data.begin() + i * n; }
+    std::vector<double>::const_iterator operator[](unsigned i) const { return data.begin() + i*n; }
+};
+
+#endif