Graphics Programs Reference
In-Depth Information
x 2 + x + 1
7
6
5
4
3
2
1
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
x
Figure2-4
that looks identical to the previous one, except that the vertical axis has
different tick marks (and MATLAB assigns the graph a different title).
Modifying Graphs
You can modify a graph in a number of ways. You can change the title above
the graph in Figure 2-4 by typing (in the Command Window, not the figure
window)
>> title 'A Parabola'
You can add a label on the horizontal axis with xlabel or change the label
on the vertical axis with ylabel . Also, you can change the horizontal and
vertical ranges of the graph with axis . For example, to confine the vertical
range to the interval from 1 to 4, type
>> axis([-2 2 1 4])
The first two numbers are the range of the horizontal axis; both ranges must
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