Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

15.3 Plotting with MATLAB 483

■Figure 15.15

The plot of Example 15.4 with

modified properties.

Generally, it is easier to use the Graph Property Editor. For example, to make the curve line

thicker, change the line color, and to add markers to the data points (with the mouse

pointer on the curve) double-click the left mouse button. Make sure you are in the picking

mode first. You may need to click on the arrow next to the print icon to activate the picking

mode. After double-clicking on the line, you should see the line and the Marker Editor

window. As shown in Figure 15.14, we increased the line thickness from 0.5 to 2, changed the

line color to black, and set the data-point marker style to Diamond. These new settings are

reflected in Figure 15.15.

Next, we will add an arrow pointing to the maximum value of the volume by selecting the

Text Arrowunder the Insertoption (see Figure 15.16), and add the text “Maximumvolume

occurs at x 1.7 cm.” These additions are reflected in Figure 15.17.

We can also change the font size and style, and make the title or the axes labels boldface. To do

so from the Menu bar, select Editand then Figure Object Properties.... Then, we pick the ob-

ject that we want to modify and using the Property Editor shown in Figure 15.18 on page 485, we

can modify the properties of the selected object. We have changed the font size and the font weight

of the title and the labels for Example 15.4 and shown the changes in Figure 15.19 on page 486.

With MATLAB, you can generate other types of plots, including contour and surface

plots. You can also control the x- andy-axis scales. For example, the MATLAB’s

loglog(x,y)uses the base-10 logarithmic scales forx- andy-axes. Notexandyare the

variables that you want to plot. The command loglog(x,y) is identical to the

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