simulation of lempel-ziv algorithm

N=input('Enter the number of Bits : ');

Unable to run the 'fevalJSON' function because it calls the 'input' function, which is not supported for this product offering.

input_data=randi([0 1],1,N);
data(1)=0;
data(2)=1;


LN=input('Enter the number of Locations : ');
dictionary=(0:LN)

Truth_table=[de2bi(dictionary,'left-msb')];
sequence=cell(1,LN+1);
code_letter=cell(1,LN+1);
base=cell(1,LN+1);
check='';
fprintf('\nInput data : \n ');
fprintf('%d',input_data);
fprintf('\n sequence\t\t\t base \t\t\tcode letter \n');

for i=1:length(input_data)
L=num2str(input_data(i));
if or((any(strcmp(sequence,'1')==1)),(any(strcmp(sequence,'0')==1)))
check=strcat(check,L);
if(any(strcmp(sequence,check)==1))
continue
else 
Code_sequence{i}=check;
end
check='';
else
sequence{i}=L;
end
emptie=find(cellfun(@isempty,sequence));
sequence(emptie)=[];
for i=1:length(sequence)
base{i}=sequence{i}(end);
if or((any(strcmp('0',sequence{i})==1)),(any(strcmp('1',sequence{i})==1)))
code_letter{i}=[num2str(Truth_table(1,:)) sequence{i}];
else
s=sequence{i}(1:end-1);
for index=1:length(sequence)
m=find(strcmp(s,sequence));
end
code_letter{i}=strcat(num2str(Truth_table(m+1,:)),sequence{i}(end));
end
end
fprintf('%s\t\t\t\t%s\t\t\t%s\t\n',sequence{i},base{i},code_letter{i}) ;
end

empties=find(cellfun(@isempty,code_letter));
code_letter(empties)=[];
N=input('Enter the number of Bits : ');
%Decoding:
DecodedData='';
DeSequence=cell(1,length(code_letter));
Test=cell(1,length(code_letter));
location=cell(1,length(code_letter));
fprintf('Refrence location\t\t\tDeSequence\t\t\tLocation\n');
for i=1:length(code_letter)
DeSequence{i}=code_letter{i}(end);
location{i}=num2str(Truth_table(i+1,:));
Test{i}=code_letter{i}(1:end-1);
if(strcmp(Test{i},num2str(Truth_table(1,:)))==1)
DecodedData=strcat(DecodedData,DeSequence{i});
else
m=find(strcmp(location,Test{i}));
DeSequence{i}=strcat(DeSequence{m},DeSequence{i});
DecodedData=strcat(DecodedData,DeSequence{i});
end
fprintf('%s\t\t\t%s\t\t\t%s\n',Test{i},DeSequence{i},location{i});
end
disp('Decoding Data :');
disp(DecodedData);

this code simulates Lempel-Ziv algorithm , yet whenever I run it if get an error in line 10

where the below is written , I tried replacing line 8 with dictionary=LN; but the same error showed , can someone please fix the code ? I'd appreciate it if you passed by the code and made the necessary changes as a whole ?, thank you

Truth_table=[de2bi(dictionary,'left-msb')];

Answer 1

[Voss]

It would be nice to know what the error message was.

In any case, try using dec2bin (which is in base MATLAB) instead of de2bi (which is in the Communications Toolbox and is not recommended in favor of int2bit).

As you can see, dec2bin can be used to get the same result you'd get with de2bi:

LN = 5;
dictionary = 0:LN;

Truth_table=[de2bi(dictionary,'left-msb')]

Truth_table = 6×3

0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1

Truth_table = dec2bin(dictionary) - '0'

Truth_table = 6×3

0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1