how to read a text file and read it line by line?

I have a text file which contains these sample of data in each line:

11-11111
11-25519
32-68129
36-14111

and I need to compare a number like these in the program with each line. for example in the program there is the number 14-68129 and there is no much in the file for it. how can I do this. the name of file is 'num.txt'. thanks

[Cedric]

So white spaces separate numbers, and dashes are some sort of internal separators, which play a role comparable to the decimal point? And are you checking each line of the file for the presence of one of these composite numbers (like 14-68129), or do you have a set of numbers? Finally, what information do you need? Just a flag that indicates the presence in the file, a flag per line, a count per line, a count for the whole file?

[Behrad kiani]

a count for the whole file

Answer 1

[sixwwwwww]

Dear Behrad, here is the complete code for your problem:

fid = fopen(filename); % Insert here the file name with complete file path
cell_data = textscan(fid, '%s');
fclose(fid);
matrix_data = [cell_data{:}];
Codes = char(matrix_data{:});
A = abs(Codes);
[m, n] = size(A);
new_code = '36-14111'; % Insert here your value you want to search in file
B = abs(new_code);
Codestatus = 0;
for i = 1:m
    if A(i, :) == B(1,:)
        disp('Code found')
        Codestatus = 1;
        break;
    end
end
if Codestatus == 0
    disp('Code not found')
end

Good luck!

[Behrad kiani]

thanks.this is exactly what I wanted

Answer 2

[Cedric]

If the string defining the composite number is stored in a variable named theNumber:

 count = numel( strfind( fileread('num.txt'), theNumber )) ;

[Cedric]

I guess that I should have made an example .. file Behrad.txt contains

 11-11111
 11-25519
 14-68129
 32-68129
 14-68129
 36-14111
 14-68129

then,

 >> count = numel( strfind( fileread('Behrad.txt'), '14-68129' ))
 count =
     3

and a count of 0 means "not found" obviously.

Answer 3

[Azzi Abdelmalek]

v={'11-11111';'11-25519';'32-68129';'36-14111'}
n= '14-68129'
idx=find(strcmp(v,n))

%To read v

fid=fopen('num.txt')
v=textscan(fid,'%s')
fclose(fid)

[Behrad kiani]

idx=find(strcmp(v,n)) does,t work?

[Azzi Abdelmalek]

What is the error message if there is any

[Behrad kiani]

thanks for your comment AZZI my internet access is very low and I couldn,t reply your comment. I found the answer below