how to obtain the graph?

i having problem to obtain a graph for the line coding. The graph that i should obtain is below:

;

But by using this code: i can't get the above graph

message=[0 1 1 0 1 0 1];

data=zeros(1,2*length(message));

data(1:2:14)=message;

i=1:7;

j=1.99:7.99;

time=[ ];

for k=1:7

time=[i(k) j()];

end

signal=[ ];

for t=1:2:14

if (data (t)==0)

signal (t:t+1)=0;

else

signal (t:t+1)=1;

end

end

figure (1);

plot (time, signal,'linewidth',2);

title ('Line Coding1' );

xlabel('Time');

xlim([1 8]);

ylabel('Amplitude');

ylim([-2 2]);

grid on

Answer 1

[TEHVISIVASANKERI NARAYANAN]

message=[0 1 1 0 1 0 1];
data=zeros(1,2*length(message));
data(1:2:14)=message;
i=1:length(message);
j=1.99:length(message)+0.99;
time=[ ];
for k=1:7
time=[time i(k) j(k)];
end
signal=[ ];
for t=1:2:14
if (data (t)==0)
signal (t:t+1)=0;
else
signal (t:t+1)=1;
end
end
figure (1);
plot (time, signal,'linewidth',2);
title ('Line Coding1' );
xlabel('Time');
xlim([1 8]);
ylabel('Amplitude');
ylim([-2 2]);
grid on


this is the right matlab code for the qs above.

Answer 2

[Thukiller]

you can try this

message=[0 1 1 0 1 0 1 1];
figure (1);
stairs(message);
title ('Line Coding1' );
xlabel('Time');
xlim([1 8]);
ylabel('Amplitude');
ylim([-2 2]);
grid on

[TEHVISIVASANKERI NARAYANAN]

thanks for your suggestion. after i try your code i obtain the graph as below. but the grph still does not same as how i supposely get it. can you help with this.

[TEHVISIVASANKERI NARAYANAN]

i have tried adding extra 1 at the message but at the command window this message was displayed

Unable to perform assignment because the left and right sides have a different number of elements.

Error in Linecoding1 (line 3)

data(1:2:14)=message;

Answer 3

[Girijashankar Sahoo]

message=[0 1 1 0 1 0 1 ];

data=[message 0]

stairs(data);

title ('Line Coding1' );

xlabel('Time');

xlim([1,8]);

ylabel('Amplitude');

ylim([-2 2]);

grid on

[TEHVISIVASANKERI NARAYANAN]

since in the intial coding i given above has declare data itself in the coding so by adding extra data i could not get the figure that i should obtained

Answer 4

[Girijashankar Sahoo]

You have 7 bit, plot in time index 1-2, 2-3, 3-4,4-5,5-6,6-7,7-8 at time index 8 it will reach to next transition value. So we take 0 as default zero pad. It does not impact on line code but complete waveform.

you can try with any another example message=[0 1 1 0 0 1 0 1 0 1 1 0 1]

after zeropad data=[message 0]

[TEHVISIVASANKERI NARAYANAN]

can i have the matlab code for this graph.

[Girijashankar Sahoo]

if it helps accept my answer

Answer 5

[Girijashankar Sahoo]

%% Bro code is same just put your message bit @message get desire line code

message=[0 1 1 0 1 0 1 ];

data=[message 0]

stairs(data);

title ('Line Coding1' );

xlabel('Time');

xlim([1,8]);

ylabel('Amplitude');

ylim([-2 2]);

grid on