how to take a value from matlab workspace

I am working on a project based on image processing using matlab. I want to know how to take a value generated in matlab workspace to outside via serial port so that I can control a system using the generated value. Also please tell me is there any other method other then using the serial port.

Answer 1

[Sabarinathan Vadivelu]

Try fwrite

fwrite

[Walter Roberson]

or fprintf()

Answer 2

[Walter Roberson]

There are a number of other methods of communication of values for controlling something. Some of them include:

• traditional hard-wired ethernet
• "firewire"
• USB
• "thunderbolt"
• WiFi
• BlueTooth
• NFC
• encode the data as sound and send it to an audio port
• get a DAQ (Digital / Analog convertor)
• parallel port (not recommended for new projects)
• get a signal generator and communicate with it using one of the above