exp1

% %PLOT UNIT STEP FUNCTION
t=[-10:1:10];
us=(t>=0);
subplot(2,2,1);
plot(t,us);
% plot(t,us);
xlabel('Values of t');                     %FOR LABELING X AND Y
ylabel('Amplitude x(t)');
title('unit step continous 101915122');
%
% %PLOT UNIT IMPULSE FUNCTION
t=[-10:1:10];
usi=(t==0);
subplot(2,2,3);
plot(t,usi);
xlabel('Values of t');                     %FOR LABELING X AND Y
ylabel('Amplitude x(t)');
title('unit impulse continous 101915122');
%
% %PLOT UNIT STEP FUNCTION
t=[-10:1:10];
us=(t>=0);                                 %BY DEFAULT VALUE IS 1
subplot(2,2,2);
stem(t,us);
stem(t,us);
xlabel('Values of n');                     %FOR LABELING X AND Y
ylabel('Amplitude x(n)');
title('unit step discrete 101915122');
%
% %PLOT UNIT IMPULSE FUNCTION
t=[-10:1:10];
usi=(t==0);
subplot(2,2,4);
stem(t,usi);
xlabel('Values of n');                     %FOR LABELING X AND Y
ylabel('Amplitude x(n)');
title('unit impulse discrete-101915122');

for x=-10:1:10
if x>=0;
    a=1;
    hold on;
else
    a=-1;
    hold on;
end
stem(x,a);
xlabel('Values of n');                     %FOR LABELING X AND Y
ylabel('Amplitude x(n)');
title('signum discrete 101915122');
end

1b
%
t=-2:0.01:2;
f=3;
duty1=25;
duty2=50;
duty3=75;
x=square(2*pi*f*t, duty1);
y=square(2*pi*f*t, duty2);
z=square(2*pi*f*t, duty3);

subplot(3,2,1)
stem(t,x);
title('Discrete Square Wave, duty cycle=25');
xlabel('n');
ylabel('x(n)');
grid on;
subplot(3,2,2)
plot(t,x);
title('Continuous Square Wave, duty cycle=25(101915122)');
xlabel('t');
ylabel('x(t)');
grid on;


subplot(3,2,3)
stem(t,y);
title('Discrete Square Wave ,duty cycle=50 ');
xlabel('n');
ylabel('y(n)');
grid on;
subplot(3,2,4)
plot(t,y);
title('Continuous Square Wave, duty cycle=50 (101915122)');
xlabel('t');
ylabel('y(t)');
grid on;


subplot(3,2,5)
stem(t,z);
title('Discrete Square Wave, duty cycle=75 ');
xlabel('n');
ylabel('z(n)');
grid on;
subplot(3,2,6)
plot(t,z);
title('Continuous Square Wave, duty cycle=75 (101915122)');
xlabel('t');
ylabel('z(t)');
grid on;

% 1c

a1=1;
f1=1;
p1=0;
a2=2;
f2=1;
p2=pi;
t=(-10:0.1:10);

x1=a1*(sin((2*pi*f1*t)+ p1));
subplot(2,1,1);
plot(t,x1);
grid on;
title('Sine Wave[a=1,f=1,p=0] (101915122)');
xlabel('t');
ylabel('t(x)');
x2=a2*(sin((2*pi*f2*t)+ p2));
subplot(2,1,2);
plot(t,x2);
grid on;
title('Sine Wave[a=2,f=1,p=pi] (101915122)');
xlabel('t');
ylabel('t(x)');