MATLAB POLYSPACE RELEASE NOTES Manual de usuario descargar pdf (Pagina 79)

Some Ways to Use MATLAB Plotting Tools

Some Wa ys to Use MATLAB Plotting Tools

In this section.. .

“Plotting Two Variables with Plotting Tools” on page 3-23

“Changing the Appearance of Lines and Markers” on page 3-26

“Adding M ore Data to the Graph” on page 3-27

“Changing the Type of Graph” on page 3-30

“Modifying the G raph Data Source” on page 3-32

Plotting Two Variables with Plotting Tools

Suppose you want to graph the function y=x

over the x domain -1 to 1. The

first step is to generate the data to plot.

It is simple to evaluate a function because M ATLAB can distribute arithmetic

operations over all elements of a multivalu ed v ariab le.

For e xample, th e following statement creates a variab l e

x that contains values

ranging from -1 to 1 in incrementsof0.1(youcouldalsousethe

linspace

function to generate data for x). The second statement raises each value in

x to the third power and stores these values in y:

x = -1:.1:1; % Define the range of x

y = x.^3; % Raise each element in x to the third power

Now that you have generated some d ata, you can plot it using the M ATLAB

plotting tools. To start the plotting tools, type

plottools

MATLAB displays a figure with plotting tools attached.

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MATLAB POLYSPACE RELEASE NOTES Manual de usuario Pagina 79