- fixed matrix operations

- fixed rms error calculation

src/rbm/status.py

@@ -7,8 +7,10 @@ class Status:
 		self.l2 = -1.0
 
 	def on_change(self) -> bool:
-		print(self)
+		print("-------------------------------------------")
+		print(f"Progress               : {self.progress} %")
+		print(f"error (per mini batch) : {self.err}")
+		print(f"error (total)          : {self.err_total}")
+		print(f"L1                     : {self.l1}")
+		print(f"L2                     : {self.l2}")
 		return True
-
-	def __repr__(self):
-		return f"Progress: {self.progress}"