Sync public subset from Flux

include/numerics/matdot.h

@@ -0,0 +1,63 @@
+#pragma once
+
+#include "./core/omp_config.h"
+
+#include "./utils/matrix.h"
+#include "./utils/vector.h"
+
+
+namespace numerics{
+
+
+	template <typename T>
+	utils::Vector<T> matdot_row(const utils::Matrix<T>& A, const utils::Matrix<T>& B){
+        
+		if (A.rows() != B.rows() || A.cols() != B.cols()){
+			throw std::runtime_error("matmul: dimension mismatch");
+        }
+        
+		const uint64_t rows = A.rows();
+		const uint64_t cols = A.cols();
+		
+
+		utils::Vector<T> c(rows, T{0});
+
+		for (uint64_t i = 0; i < rows; ++i){
+            T sum = T{0};
+			for (uint64_t j = 0; j < cols; ++j){
+				sum += A(i,j) * A(i,j);
+			}
+            c[i] = sum;
+		}
+		return c;
+	}
+
+    template <typename T>
+    utils::Vector<T> matdot_col(const utils::Matrix<T>& A, const utils::Matrix<T>& B){
+        
+        if (A.rows() != B.rows() || A.cols() != B.cols()){
+            throw std::runtime_error("matmul: dimension mismatch");
+        }
+        
+        const uint64_t rows = A.rows();
+        const uint64_t cols = A.cols();
+        
+
+        utils::Vector<T> c(cols, T{0});
+
+        for (uint64_t j = 0; j < cols; ++j){
+            T sum = T{0};
+            for (uint64_t i = 0; i < rows; ++i){
+                sum += A(i,j) * A(i,j);
+            }
+            c[j] = sum;
+        }
+        return c;
+    }
+
+
+
+
+
+} // namespace numerics
+