diff --git a/imageInput.c b/imageInput.c
index d8ad4f2..dd3bba6 100644
--- a/imageInput.c
+++ b/imageInput.c
@@ -10,15 +10,11 @@
 
 static void readPictureData(FILE *file, unsigned short *ptrPicturesCount, unsigned short *ptrPictureWidth, unsigned short *ptrPictureHeight)
 {
-	unsigned int header = strlen(FILE_HEADER_STRING);
-
-	fseek(file, header, SEEK_SET);
 
 	fread(ptrPicturesCount, sizeof(unsigned short), 1, file);
 	fread(ptrPictureWidth, sizeof(unsigned short), 1, file);
 	fread(ptrPictureHeight, sizeof(unsigned short), 1, file);
 
-
 }
 
 
@@ -27,28 +23,39 @@ GrayScaleImageSeries *readImages(const char *path)
 {
 	unsigned short picturesCount, pictureWidth, pictureHeight;
     GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
-    char line[26];
+    char line[strlen(FILE_HEADER_STRING)+1];
 
     FILE *file = fopen(path,"rb");
 
+	//Prüfen auf erfolgreiches Öffnen der Datei
+
     if (file == NULL){
         printf("failed open file\n");
 
         return NULL;
     }
 
-    fread(line, sizeof(line), 1, file);
+	//Prüfen auf übereinstimmung des headers
+
+    fread(line,1, strlen(FILE_HEADER_STRING), file);
+
+	line[strlen(FILE_HEADER_STRING)] = '\0';
+
     if(strncmp(line, FILE_HEADER_STRING, strlen(FILE_HEADER_STRING))!=0)return NULL;
 
-    fseek(file, 0, SEEK_SET);
 
 
+	//Anzahl, Breite und Höhe der Bilder einlesen
+
     readPictureData(file, &picturesCount, &pictureWidth, &pictureHeight);
 
+	//Speicher für lables und images zuornden
+
     series->labels = (unsigned char*)malloc(picturesCount * sizeof(char));
 	series->images = (GrayScaleImage*)malloc(picturesCount * sizeof(GrayScaleImage));
     series->count = picturesCount;
 
+	//speicher reservierung für images und Einlesen der Bilddaten und labels
     for(int i = 0; i < picturesCount; i++){
         series->images[i].width = pictureWidth;
         series->images[i].height = pictureHeight;
@@ -74,4 +81,5 @@ void clearSeries(GrayScaleImageSeries *series)
 
     free(series->images);
     free(series->labels);
+	free(series);
 }
diff --git a/matrix.c b/matrix.c
index 2d33b96..04df5e8 100644
--- a/matrix.c
+++ b/matrix.c
@@ -7,11 +7,11 @@
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
     if(rows <= 0 || cols <= 0){
-        Matrix matrix = { 0 , 0 , UNDEFINED_MATRIX_VALUE };
+        Matrix matrix = { NULL , 0 , UNDEFINED_MATRIX_VALUE };
         return matrix;
     }
 
-    Matrix matrix = { rows , cols };
+    Matrix matrix = { 0 ,rows , cols };
 
     matrix.buffer = malloc((sizeof(MatrixType)*rows*cols));
 
@@ -47,6 +47,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
     int matrixResultCols;
 
+	//abgleichen welche matrix die größere spalten anzahl besitzt
     if(matrix1.cols <= matrix2.cols){
         matrixResultCols = matrix2.cols;
     }
@@ -54,8 +55,10 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
         matrixResultCols = matrix1.cols;
     }
 
+	//Matrix für das ergebnis generieren
     Matrix result = createMatrix(matrix1.rows, matrixResultCols);
 
+	//prüfen auf gleiche Reihenanzahl
     if(matrix1.rows != matrix2.rows){
 
         result.buffer = NULL;
@@ -64,6 +67,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
         return result;
     }
 
+	//Addition bei gleicher spalten Anzahl
     if(matrix1.cols == matrix2.cols){
         for(int i = 0; i < matrix1.rows; i++){
            for(int j = 0; j < matrix1.cols; j++){
@@ -72,6 +76,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
         }
     }
 
+	//Addition wenn matrix1 nur eine Spalte hat
     if((matrix1.cols ==1 && matrix2.cols != 1)){
        for(int i = 0; i < matrix2.rows; i++){
           for(int j = 0; j < matrix2.cols; j++){
@@ -80,6 +85,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
         }
     }
 
+	//Addition wenn matrix2 nur eine Spalte hat
    if((matrix2.cols == 1 && matrix1.cols != 1)){
        for(int i = 0; i < matrix1.rows; i++){
            for(int j = 0; j < matrix1.cols; j++){
@@ -94,7 +100,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
     if (matrix1.cols != matrix2.rows) {
-        Matrix invalid = {0,0, NULL};
+        Matrix invalid = {NULL ,0, 0};
         return invalid;
     }
 
diff --git a/matrix.h b/matrix.h
index 49c981d..e65f9e6 100644
--- a/matrix.h
+++ b/matrix.h
@@ -6,9 +6,9 @@
 typedef float MatrixType;
 
 typedef struct{
+	MatrixType *buffer;
     unsigned int rows;
     unsigned int cols;
-    MatrixType *buffer;
 }Matrix;
 // TODO Matrixtyp definieren