how to dlmwrite a file from array - matlab

Question

How to write the cell as below in text file(my_data.out)?
http_only = cell2mat(http_only)
dlmwrite('my_data.out',http_only)
I get the error as below:(I have tried to solve but still return me the error)
Here is my full code:
I want to generate the text file for each of the data which only store 'http_only'
then check for that is it meet the word in split_URL.
%data = importdata('DATA/URL/training_URL')
data = importdata('DATA/URL/testing_URL')
domain_URL = regexp(data,'\w*://[^/]*','match','once')
no_http_URL = regexp(domain_URL,'https?://(?:www\.)?(.*)','tokens','once');
no_http_URL = vertcat(no_http_URL{:});
split_URL = regexp(no_http_URL,'[:/.]*','split')
[sizeData b] = size(split_URL);
for i = 1:100
A7_data = split_URL{i};
data2=fopen(strcat('DATA\WEBPAGE_SOURCE\TESTING_DATA\',int2str(i),'.htm'),'r')
CharData = fread(data2, '*char')'; %read text file and store data in CharData
fclose(data2);
img_only = regexp(CharData, '<img src.*?>', 'match'); %checking
http_only = regexp(img_only, '"http.*?"', 'match');
http_only1 = horzcat(http_only{:});
fid = fopen('my_data.out',int2str(i),'w');
for col = 1:numel(http_only1)
fprintf(fid,'%s\n',http_only1{:,col});
end
fclose(fid);
feature7_data=(~cellfun('isempty', regexpi(CharData , A7_data, 'once')))
B7(i)=sum(feature7_data)
end
feature7(B7>=5)=-1;
feature7(B7<5&B7>2)=0;
feature7(B7<=2)=1;
feature7'

Answer 1

Write cell-by-cell using fprintf -
fid = fopen('my_data.out','w');
for col = 1:numel(http_only)
fprintf(fid,'%s\n',http_only{:,col});
end
fclose(fid);
Edit 1: If your input is a cell array of cell arrays, use this code instead.
Code
http_only1 = horzcat(http_only{:});
fid = fopen('my_data.out','w');
for col = 1:numel(http_only1)
fprintf(fid,'%s\n',http_only1{:,col});
end
fclose(fid);
Edit 2: For a number of inputs to be stored into separate files, use this demo -
data1 = {{'[]'} {'"http://google.com"'} {'"http://yahoo.com'}};
data2 = {{'[]'} {'"http://overflow.com"'} {'"http://meta.exchange.com'}};
data = cat(1,data1,data2);
for k = 1:size(data,1)
data_mat = horzcat(data{k,:});
out_filename = strcat(out_basename,num2str(k),'.out');
fid = fopen(out_filename,'w');
for col = 1:numel(data_mat)
fprintf(fid,'%s\n',data_mat{:,col});
end
fclose(fid);
end