MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 165)

Scripts and Functions

The two global statements make the value assigned to GRAVITY at the

command prompt available inside the function. You can then modify

GRAVITY

interactively and obtain new solutions without editing any files.

Passing String Arguments to Functions

You can write MATLAB functions that accept string arguments without the

parentheses and quotes. That is, MATLAB interprets

fooabc

foo('a','b','c')

However, when you use the unquoted form, MATLAB cannot return output

arguments. For example,

legend apples oranges

creates a legend on a plot using the strings apples and oranges as labels. If

you want the

legend command to return its output arguments, then you

must use the quoted form:

[legh,objh] = legend('apples','or ange s');

In addition, you must use the quoted form if any of the arguments is not

astring.

Caution While the unquoted syntax is convenient, in some cases it can be

used incorrectly without causing MATLAB to generate an error.

Constructing String Arguments in Code

The quoted form enables you to construct string arguments within the

code. The following example processes multiple data files,

August1.dat,

August2.dat, and so on. It uses the function i nt2str,whichconvertsan

integer to a character, to build the filename:

ford=1:31

4-27

1 2 ... 160 161 162 163 164 165 166 167 168 169 170 ... 239 240

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MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur Page 165