diff --git a/info2praktikum-neuronalesnetz/matrix.h b/info2praktikum-neuronalesnetz/matrix.h
index cc640d1..f38b8a5 100644
--- a/info2praktikum-neuronalesnetz/matrix.h
+++ b/info2praktikum-neuronalesnetz/matrix.h
@@ -3,6 +3,13 @@
 
 #define UNDEFINED_MATRIX_VALUE 0
 
+typedef struct{
+  size_t rows;
+  size_t cols;
+  double* data;
+ } Matrix;
+
+
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren