Program Code
t=0:0.01:4;y=square(2*pi*t,50);
plot (t,y);
axis ([0 4 -2 2]);
xlabel ('Time');
ylabel ('Amplitude');
title ('Square Waveform');
grid on;
Output
Explanation of Program Code
clc;
It clears all input and
output from the Command Window display giving clean screen. It removes items
from workspace, freeing up system memory. After using clc, the scroll bar
cannot be used to see the history of functions, but still the up arrow can be
used to recall statements from the command history.
clear all;
It removes all variables
from the workspace. This frees up system memory.
close all;
It deletes all figures
whose handles are not hidden.
t=0:0.01:4;
Here vector t is created as
time axis.
Vector t has 401 elements.
The starting element is 0 and the final element is 4. There is an increment of
0.01 between consecutive elements of vector t.
y=square(2*pi*t,50);
This command creates a square
waveform.
plot (t,y);
It plots all the lines
defined by t versus y pairs. That is, it makes the square waveform appear on
the screen.
axis ([0 4 -2 2]);
It sets the limits for the x-
and y-axis of the current axes.
Here according to the above
command x-axis begins at 0 and ends at 4. Here y-axis begins at -2 and ends at
2.
xlabel ('Time');
It labels x axis(time axis)
as Time. Each axes graphics object can have one label for the x-, y-, and
z-axis. The label appears beneath its respective axis in a two-dimensional
plot.
ylabel ('Amplitude');
It labels y axis as
amplitude.
title ('Square Waveform');
It outputs the
phrase 'Square Waveform' above the figure at the top.
grid on;
It adds major grid lines to
the current axes.
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