Include regression metrics.

regression_quality_measures/regression_metrics.py

+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Mar 10 12:01:10 2022
+
+@author: jsteiglechner
+"""
+
+
+import torch
+
+
+def my_mean_squared_error(output: torch.Tensor,
+                          target: torch.Tensor) -> torch.Tensor:
+    """Use mean squared error with own function."""
+    return torch.mean((output - target)**2)