how to transfer data

Hai

I am new to matlab,I want to connect two computers in a matlab and want to send message (for example 'hai') from one system to another,can this be done,if yes please help me how to start with,i am new to matlab

[Information merged from second question]

I have a program compression and decompression of images,I have codes for it, i want to run compression on one computer and decompression on another computer, I am using matlab 7.10.0, is it possible to do, if so can u tell wat codes to add anf how to do it, I will greatful to u ,

Thanks in advance

Answer 1

[Walter Roberson]

Yes, it is possible.

You can send data between systems by using a serial port, or by using a parallel port, or by converting the data to audio signals and converting the audio back to data, or by connecting the two systems with a network cable and using UDP or TCP, or by installing WIFI on the systems and transferring the data wirelessly; or by other similar methods.

There are too many different possibilities for anyone to show sample code for each of the possibilities. You should narrow down your choices.

How far away will the systems be from each other? Is a physical cable between them practical? Does the environment have a lot of electromagnetic noise? Will there be a microwave oven operating nearby? What rate will the data transfer need to occur at? What is the maximum acceptable delay between the time that one system starts sending data and the time the data is available to MATLAB on the second system?

[kash]

MY system is just a meter apart ,and there are no noises,and i have a local area network connection(a physical cable),i dont have idea about delay.

can u send codes how to connct using UDP or TCP

[Walter Roberson]

http://www.mathworks.com/products/instrument/hardware/tcpip.html

Note: if you do not have the Instrument Control Toolbox, then you can substitute the MATLAB File Exchange contribution "tcpudpip"

[kash]

is there any demo available for this

[Walter Roberson]

The page I linked to has three demos.

Answer 2

[Daniel Shub]

The answer depends on a number of factors. Under MS Windows you can control MATLAB via activex: http://www.mathworks.co.uk/help/techdoc/matlab_external/brd0v3w.html You also might want to look at the distributed computing toolbox. You can also just launch MATLAB from MATLAB. Does your compression program need to talk to you decompression program?

There are also Java based solutions ...

[kash]

can u tell how to launch MATLAB from MATLAB

i did not understand what you mean by compression program need to talk to you decompression program

please help

[Daniel Shub]

You can launch any system command with ! -- so to launch MATLAB you would do

!matlab

You can make MATLAB start a script/function with the -r flag, or you can launch in a directory that has a startup.m file that calls you function.

[Deepu S S]

Hi ,how to tranfer stream of data from one matlab scrip to another, the two matlab scripts in a system. Is it posible?

Any demo available in MathWorks?