MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur télécharger pdf (Page 105)

Using Basic Plotting Functions

In this section.. .

“Creating a Plot” on page 3-49

“Plotting Multiple Data Sets in One Graph” on page 3-50

“Specifying Line Styles a nd Colors” on page 3-51

“Plotting Lines and Markers” on page 3-52

“Graphing Imaginary and Complex Data” on page 3-53

“Adding Plots to an Existing Graph” on page 3-54

“Figure Windows” on page 3-55

“Displaying M ultiple Plots in One Figure” on page 3-56

“Controlling the Axes” on page 3-58

“AddingAxisLabelsandTitles”onpage3-59

“Saving Figures” on page 3-61

Creating a Plot

The plot fu ncti on has differe n t forms, depe nding on the input argum en ts. If

y is a vector, plo t(y) produces a piecewise linear g raph of the ele m ents of y

versus the index of the elements of y. If you specify two vectors as arguments,

plot(x,y) produces a graph of y versus x.

For example, these statements use the

colon operator to create a vector of

x values ranging from 0 to 2 π, compute the sine of these values, and plot

the result:

x = 0:pi/100:2*pi;

y = sin(x);

plot(x,y)

Now label the axes and add a title. The characters \pi create the symbol π.

See “text strings” in the MATLAB Reference documentation for more symbols:

xlabel('x = 0:2\pi')

ylabel('Sine of x')

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MATLAB POLYSPACE RELEASE NOTES Manuel d'utilisateur Page 105