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resent data and perform manipulations on them. For example, enter and note
the answer to each of the following:

a=2
b=3
c=a+b
d=a*b
e=a/b
f=a^3/b^2
g=a+3*b^2

Question: From the above, can you deduce the order in which MATLAB per-
forms the basic operations?

In-Class Exercise

Pb. 1.1 Using the above values of a and b, find the values of:
a. h = sin(a) sin(b)
b
b. i = a 1/3 3/7
–1
c. j = sin (a/b) = arcsin(a/b)

1.3 Plotting Points
In this chapter section, you will learn how to use some simple MATLAB
graphics commands to plot points. We use these graphics commands later in
the text for plotting functions and for visualizing their properties. To view all
the functions connected with 2-dimensional graphics, type:

help plot

All graphics functions connected with 3-dimensional graphics can be looked
up by typing

help plot3
A point P in the x-y plane is specified by two coordinates. The x-coordinate
measures the horizontal distance of the point from the y-axis, while the
y-coordinate measures the vertical distance above the x-axis. These coordi-

© 2001 by CRC Press LLC