fopen with correct file format and path - matlab

Question

How do I get to read my file with increment .htm file with correct file format and path?
path:DATA\WEBPAGE_SOURCE\train75_phish_data\1.htm
file:1.htm,2.htm,3.htm....etc
Inside 1.htm,2.htm,3.htm....etc are the soucre code of webpage
I do try with the following example, but got the error when i=21.
data2=fopen(strcat('DATA\WEBPAGE_SOURCE\train75_phish_data\',int2str(i),'.htm'),'r')
I have refer to this, still cannot work, any ideas?
http://www.mathworks.com/help/matlab/ref/fopen.html
Here is my code:
data = importdata('DATA/URL/trainURL')
domain_URL = regexp(data,'\w*://[^/]*','match','once')
[sizeData b] = size(domain_URL);
for i = 1:150
A7_data = domain_URL{i};
data2=fopen(strcat('DATA\WEBPAGE_SOURCE\train75_phish_data\',int2str(i),'.htm'),'r')
CharData = fread(data2, '*char')'; %read text file and store data in CharData
img_only = regexp(CharData, '<img.*?>', 'match');
feature7_data=(cellfun(#(n) isempty(n), strfind(img_only, A7_data)))
B7(i)=sum(feature7_data)
end
feature7(B7>=10)=1;
feature7(B7<10&B7>5)=0;
feature7(B7<=5)=-1;
feature7'
Here is my output:
data = importdata('DATA/URL/trainURL') is a list of URL being saved inside
I could not loop the results for i=20, it will come to error when iteration=21, I want to loop until 150, it cnt read the 'data2' for 'i=21'

Answer 1

I think you need to handle possible exceptions that can come in a more principled way. Try this:
data = importdata('DATA/URL/trainURL')
domain_URL = regexp(data,'\w*://[^/]*','match','once')
[sizeData b] = size(domain_URL);
for i = 1:150
A7_data = domain_URL{i};
filename = fullfile('DATA\WEBPAGE_SOURCE\train75_phish_data\',strcat(int2str(i),'.htm'));
if (exist(filename,'file')),
disp(sprintf('file %s exists, processing it',filename));
data2=fopen(filename,'r');
CharData = fread(data2, '*char')'; %read text file and store data in CharData
fclose(data2);
img_only = regexp(CharData, '<img.*?>', 'match');
feature7_data=(cellfun(#(n) isempty(n), strfind(img_only, A7_data)))
B7(i)=sum(feature7_data)
else,
disp(sprintf('file %s does not exist, skipping it!',filename));
end
end
feature7(B7>=10)=1;
feature7(B7<10&B7>5)=0;
feature7(B7<=5)=-1;
feature7'
after the line that does the fread.