Merge 2 text file in same row / same line

Hi, i would like to combine 2 text file.

The data shown as below:

a1.txt

0:0 1:63 2:55 3:55

aa1.txt

4:54 5:56 6:61

I have try use code from below link:

https://www.mathworks.com/matlabcentral/answers/382971-how-to-combine-4-txt-files-in-a-single-txt-file#answer_305504

%Combine Text File%

File = {'a1.txt', 'aa1.txt'};  % Thanks Walter
numberOfFiles = length(File);                     %

C = cell(1, numberOfFiles);
for k = 1:numberOfFiles
  C{k} = strsplit(fileread(File{k}), '\n');
end

AllC = C{1};
for k = 2:numel(C)
  AllC = strcat(AllC, {''}, C{k});  % [EDITED] With a space as separator here
end

[fid, msg] = fopen('a_fuse.txt', 'w');
if fid == -1, error('Cannot open file for writing: %s', msg); end
fprintf(fid, '%s\n', AllC{:});
fclose(fid);

the output will become as below:

0:0 1:63 2:55 3:55

4:54 5:56 6:61

BUT, i want the out put become as below:

0:0 1:63 2:55 3:55 4:54 5:56 6:61

Answer 1

[KSSV]

File = {'a1.txt', 'aa1.txt'}; 
N = length(File);       
for i = 1:N
    fid = fopen(File{i},'rt') ; 
     C = textscan(fid,'%s') ; 
     S{i} = C{1} ;
     
end
S = strjoin(S)

[Farhan Hakimi Anuar]

got bellow error once i run the code:

>> Untitled2

Error using strjoin (line 53)

First input must be a string array or cell array of character vectors.

Error in Untitled2 (line 8)

S = strjoin(S)

[KSSV]

Now try...

[Farhan Hakimi Anuar]

still can't same message as before.

File = {'a1.txt', 'aa1.txt'}; 
N = length(File);       
for i = 1:N
    fid = fopen(File{i},'rt') ; 
     C = textscan(fid,'%s') ; 
     S{i} = C{1} ;
     
end
S = strjoin(S)                   

C = cell(1, numberOfFiles);
for k = 1:numberOfFiles
  C{k} = strsplit(fileread(File{k}), '\n');
end

AllC = C{1};
for k = 2:numel(C)
  AllC = strcat(AllC, {''}, C{k});  % [EDITED] With a space as separator here
end

[fid, msg] = fopen('a_fuse.txt', 'w');
if fid == -1, error('Cannot open file for writing: %s', msg); end
fprintf(fid, '%s\n', AllC{:});
fclose(fid);

File = {'a1.txt', 'aa1.txt'}; 

[Farhan Hakimi Anuar]

This how the data being arrange.