MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 159)

Scripts and Functions

If you duplicate function names, MATLAB executes the one that o ccurs first

in the search path.

To view the contents of an M-file, for example,

myfunction.m,use

type myfunction

Scripts

When you i nvoke a script, MATLAB simply executes the comm ands found in

thefile. Scriptscanoperateonexisting data in the workspace, or they can

create new data on which to operate. Although scripts do not return output

arguments, any variables that they create remain in the workspace, to be

used in subsequent computations. In a ddition, scripts can produce graphical

output using functions like

plot.

For exam ple, create a file called

magicrank.m that contains these MATLAB

commands:

% Investigate the rank of mag ic squares

r = zeros(1,32);

for n = 3:32

r(n) = rank(magic(n));

end

bar(r)

Typing the statement

magicrank

causes M ATLAB to execute the commands, compute the rank of the first 30

magic squares, and plot a bar graph of the result. After execution of the file is

complete, the variables

n and r remain in the workspace.

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MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur Page 159