Hello everyone here i am having a problem Getting Undefined offset: 1, although array $row is having the values
 public function model(array $row)
    {      
        return new Result([
            'roll'=>$row[0], 
            'cname'=>$row[1], 
            'mname'=>$row[2], 
            'fname'=>$row[3], 
            'dob'=>$row[4], 
            'school_code'=>$row[5], 
            'h1'=>$row[6], 
            'h2'=>$row[7], 
            'e1'=>$row[8], 
            'e2'=>$row[9], 
            'sanskrit'=>$row[10], 
            'm1'=>$row[11], 
            'm2'=>$row[12], 
            's1'=>$row[13], 
            's2'=>$row[14], 
            's3'=>$row[15], 
            'sp'=>$row[16], 
            'sst1'=>$row[17], 
            'sst2'=>$row[18], 
            'result'=>$row[19], 
            'grace'=>$row[20], 
        ]);
    }
please help me out, i am trying excel file data to sql in laravel
