1.
Generating Row
Vectors

Manually generating row
vectors can be tedious especially if they are very long but fortunately MATLAB has
better ways.

a)
In this method
the Start, Step Size and End values are entered.

row_vector = ( start value : step size : end value )

For
example,

t
= ( 0 : .01 : .99 ) generates a row vector from 0 to .99 in steps of .01

i = ( 10 : 5 : 1000 ) generates a row vector from 10 to
1000 in steps of 5

If only 2 values are entered
the step size is automatically set to 1.

j
= ( 0 : 1000 ) generates a row vector from 0 to 1000 in steps of 1.

b)
With the linspace command the Start, End and
Number of Points (elements) are entered.

row_vector = linspace(
start value, end value, number of points)

For
example,

t
= linspace( 0, .99, 100 )

generates
a row vector from 0 to .99 with 100 points

n
= linspace( -10, 50, 20 )

generates
a row vector from -10 to 50 with 20 points

If only 2 values are entered the
number of points is automatically set to 100.

j
= linspace( 0, 1000 )

generates
a row vector from 0 to 1000 with 100 points

2.
Plotting with
MATLAB

a)
The plot command

The
plot( x, y ) command plots the y
vector (on the y axis) with respect to the x
vector (on the x axis). Notice the x axis vector is written first in the
command.

Examples

i.
t = linspace( 0,
4*pi) generates 100 points from 0 to 4π

y = sin(t)

plot(t, y) plots 2 cycles of a sine wave

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