MATLAB
MATLAB Examples

MATLAB is a directory of MATLAB programs which illustrate the use of the MATLAB interactive programming environment.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

Directories related to MATLAB are available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

F90_MATLAB, MATLAB functions which are called by a FORTRAN90 program.

MATLAB_C, MATLAB programs which call a C function using the MEX facility.

MATLAB_COMMANDLINE, MATLAB programs which illustrate how MATLAB can be run from the UNIX command line, that is, not with the usual MATLAB command window.

MATLAB_F77, MATLAB programs which call a FORTRAN77 function using the MEX facility.

MATLAB_MOVIES, MATLAB programs which generate animations.

MATLAB_OS, MATLAB programs which invoke an operating system command.

MATLAB_RANDOM, MATLAB programs which illustrate the use of Matlab's random number generators.

Source Code:

CPU_TIMING shows how you can measure the CPU time required for a given computation.

• cpu_timing.m, the program.
• cpu_timing.txt, the output file.

FACTORIAL uses the standard example of the factorial function to demonstrate MATLAB's ability to implement a recursive function.

• factorial.m, the program.

FILES shows how MATLAB can check whether a directory exists, and create it or remove it.

• files.m, the program.
• files.txt, the output file.

GLOBAL_VARIABLES shows how two functions can communicate the value of a variable, without using the argument list, by declaring the variable with a GLOBAL statement.

• global_variables.m, the program.
• global_variables.png

HELLO is a simple example to print out "Hello, world!".

• hello.m, the program.
• hello.txt, the output file.

HELLO_ITHACA_QUEUE shows how the "Hello" program can be run on the Ithaca cluster.

• hello.m, the program.
• hello_ithaca_queue.sh, an NQS file that can be submitted to the Ithaca queue by the command "qsub hello_ithaca_queue.sh".
• hello_ithaca_queue.txt, the output file.

INTEGER_PRINT looks at how to print an integer array so that all the digits show up, without a scaling factor.

• integer_print.m, the program.
• integer_print.txt, the output file.

PERSIST shows how a persistent variable can be used to "remember" the value of some variable within a function between calls.

• persist.m, the program.
• persist.txt, the output file.

RAND_TEST looks at how rand() generates uniform random values.

• rand_test.m, the source code;
• rand_test.txt, the output file;

RANDN_TEST looks at how randn() generates normal random values.

• randn_test.m, the source code;
• randn_test.txt, the output file;

RECURSIVE_TEST shows how you can use recursion in a function definition.

• recursive_test.m, the source code;
• recursive_test.txt, the output file;

SPACING_MATTERS demonstrates that MATLAB can fail to interpret an arithmetic statement correctly because of the occurrence of a blank space. This occurs when creating a vector by listing entries. MATLAB allows the lazy practice of not separating entries by commas, and the result can be an error that is very hard to interpret.

• spacing_matters.m, the program.

STARTUP is a MATLAB script that can be used to initialize MATLAB. You have to know where to put it, though. (Hint: start MATLAB, and type "pwd" to find out where MATLAB starts by default. That's where you want to put this file.)

• startup.m, a simple startup file that moves MATLAB's current directory to a place that suits me better.

You can go up one level to the MATLAB source codes.