missing RaspberryPi functions ? mycamera and cameraboard ? help please

I can execute raspistill and other Linux commands using the h.execute('command') functions, but when I try to follow the examples using mycamera or cameraboard, I get an error.

The following is a copy of the 'attempts'

I think there is something 'missing' but I don't know what it would be.

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>> h = raspberrypi('192.168.1.141', 'pi','raspberry')

h = 

    LinuxServices with properties:

      HostName: '192.168.1.141'
      UserName: 'pi'
      Password: 'raspberry'
      BuildDir: '/home/pi'

>> msg = h.execute('ls -ltr')

msg =

       0

>> [status,msg] = h.execute('raspistill -o mlpix.jpg')

status =

       0

msg =

       ''

>> [status,msg] = h.execute('ls -ltr')

status =

       0

msg =

total 4848
drwxrwxr-x 2 pi pi    4096 Jan 27  2015 python_games
drwxr-xr-x 2 pi pi    4096 Feb  4  2015 Desktop
-rw-r--r-- 1 pi pi 2250521 Oct  3 02:59 image1.jpg
-rw-r--r-- 1 pi pi 2695314 Oct  5 01:10 mlpix.jpg

>> h.execute('raspistill -o mlpix1.jpg')

ans =

       0

>> [status,msg] = h.execute('ls -ltr')

status =

       0

msg =

total 7460
drwxrwxr-x 2 pi pi    4096 Jan 27  2015 python_games
drwxr-xr-x 2 pi pi    4096 Feb  4  2015 Desktop
-rw-r--r-- 1 pi pi 2250521 Oct  3 02:59 image1.jpg
-rw-r--r-- 1 pi pi 2695314 Oct  5 01:10 mlpix.jpg
-rw-r--r-- 1 pi pi 2670367 Oct  5 01:12 mlpix1.jpg

>> img = snapshot(mycamera)
Undefined function or variable 'mycamera'.

>> raspi
Error using raspi (line 157)
Cannot establish an SSH connection to the board with device address "raspberrypi-oyA7GXtjsW".

Caused by:
    Error using raspi (line 153)
    Error executing command: Unable to open connection:
    Host does not exist

>> raspi = h

raspi = 

    LinuxServices with properties:

      HostName: '192.168.1.141'
      UserName: 'pi'
      Password: 'raspberry'
      BuildDir: '/home/pi'

>> img = snapshot(mycamera)
Undefined function or variable 'mycamera'.

>> raspi.execute('raspistill -o mlpix3.jpg')

ans =

       0

>> [status,msg] = h.execute('ls -ltr')

status =

       0

msg =

total 9968
drwxrwxr-x 2 pi pi    4096 Jan 27  2015 python_games
drwxr-xr-x 2 pi pi    4096 Feb  4  2015 Desktop
-rw-r--r-- 1 pi pi 2250521 Oct  3 02:59 image1.jpg
-rw-r--r-- 1 pi pi 2695314 Oct  5 01:10 mlpix.jpg
-rw-r--r-- 1 pi pi 2670367 Oct  5 01:12 mlpix1.jpg
-rw-r--r-- 1 pi pi 2557407 Oct  5 01:18 mlpix3.jpg

>> mypi = h

mypi = 

    LinuxServices with properties:

      HostName: '192.168.1.141'
      UserName: 'pi'
      Password: 'raspberry'
      BuildDir: '/home/pi'

>> img = snapshot(mycamera)
Undefined function or variable 'mycamera'.

>>

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/supportpkg/raspberrypiio/ref/cameraboard.html

Answer 2

[Madhu Govindarajan]

Have you tried using the cameraboard function??? I don't see that in the code you have mentioned here. I would try something like - mycamera = cameraboard(h,'Resolution','1280x720') img = snapshot(mycamera)