How to read values from a pressure controller using matlab

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As i am new to this concept, i would like to know some information.

"I have a pressure guage which is connected to pressure controller where i can see the values of pressure on the display. I have connected rs 232 serial interface between the controller and computer.so i would like to know how to read the display values and store it in text file using matlab."

I have started the code like this in the command window s=serial('COM1','Baudrate',9600,'Terminator','CR') fopen(s)

Serial Port Object : Serial-COM1

Communication Settings Port: COM1 BaudRate: 9600 Terminator: 'CR'

Communication State Status: closed RecordStatus: off

Read/Write State TransferStatus: idle BytesAvailable: 0 ValuesReceived: 0 ValuesSent: 0