MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 136)

3 Graphics

Specifyi

ng the Axes or Figure

MATLAB al

ways creates an axes o r figure if one does not exist when you

issue a pl

otting command. However, when you are creating a graphics M-file,

it is good

practice to explicitly create and specify the parent axes and figure,

particu

larly if others will use your program. Specifying the parent prevents

the f oll

owing problems:

• Your M -f

ile o verwrites the graph in the current figure. Note that a figure

becomes

the current figure wh enever a u ser clicks it.

• The curr

ent figure might be in an unexpected state and not behave as

your pro

gram expects.

The foll

owing e xa mple shows a simp le M-file th at plots a fu ncti on and the

mean of

the function over the specified range:

function myfunc(x)

% x = -10:.005 :40; Here's a value you can use for x

y = [1.5*cos(x) + 6*exp(-.1*x) + exp(.07*x).*sin(3*x)];

ym = mean(y);

3-80

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MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur Page 136