Unable to receive data from ROS Master using Matlab

edit

I would like to connect to ROS network using Matlab and plot the laser scanner data

• The ROS framework runs on a rover with IP address: 160.80.97.150. The rover is publishing laserscanner data on the /scan topic
• Matlab runs on another computer with IP: 160.80.97.241

The port 11311 on the rover is opened:

heavylab@HeavyLab:~$ nmap 160.80.97.150 -p 11311

Starting Nmap 6.40 ( http://nmap.org ) at 2016-04-01 14:30 CEST
Nmap scan report for 160.80.97.150
Host is up (0.000030s latency).
PORT      STATE SERVICE
11311/tcp open  unknown

Nmap done: 1 IP address (1 host up) scanned in 0.09 seconds

The Problem

I am able to see the published topics from matlab but they seems empty. The receive command returns an error.

    % Connect to a remote ROS instance on port 11311
    rosinit('http://160.80.97.150:11311', 'NodeHost', '160.80.97.241')

    % Check for topics
    rostopic list

/scan            

    % Echo for /scan topic
    laser = rossubscriber('/scan')


laser = 

  Subscriber with properties:

        TopicName: '/scan'
      MessageType: 'sensor_msgs/LaserScan'
    LatestMessage: [0x1 LaserScan]
       BufferSize: 1
    NewMessageFcn: []

    % Receive Scan data
    scandata = receive(laser,10)

     Error using robotics.ros.Subscriber/receive
     (line 291)
     The function did not receive any data and timed
     out.

Do have any advice?

EDIT

Here is the output of the rosnode ping from Matlab:

 rosnode ping /rosout
    Pinging the /rosout node with a timeout of 3 seconds.
    Received no ping response.