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An Introduction to MATLAB: Running MATLAB (PC)

Module by: Louis Scharf. E-mail the author

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This module is part of the collection, A First Course in Electrical and Computer Engineering. The LaTeX source files for this collection were created using an optical character recognition technology, and because of this process there may be more errors than usual. Please contact us if you discover any errors.

In order to run MATLAB (Version 3.5) on an IBM or compatible personal computer, you must have a floating point math coprocessor (80x87)(80x87)installed and at least 512 kbytes of memory. The program is called PCMAT-LAB.EXE, but it is usually invoked via the batch file MATLAB.BAT in the MATLAB subdirectory. If you are using a menu system and MATLAB is one of your choices, just choose it. Otherwise, go to the MATLAB suiUirectory and type MATLAB.

You may be able to usea more powerful implementation of MATLAB if you have an 80286 or 80386 machine. AT-MATLAB runs on an 80286 with at least 1 Mbyte of extended memory. AT-MATLAB is distributed with PC-MATLAB. 386-MATLAB, a special version for 80386 or 80486 machines with virtual memory support and no limits on variable size, is sold separately.

When you run MATLAB, you should see the prompt ≫≫. The program interpreter is waiting for you to enter instructions. Some MATLAB instructions, such as plot, are graphics-type instructions which plot results and data. Execution of one of these graphics instructions puts the PC screen into the graphics mode, which displays the resulting plot. No instructions can be executed in the graphics mode other than a screen-dump function. Striking any other key will return the PC to the command mode, but the graphics are temporarily stored (like variables) and can be recalled by the shg (show graphics) instruction. If you wish, you may run some of the demonstration programs now by entering demo and following the on-screen instructions.

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