Hoe to Empty Line Discover!

Hi-

I have text file (T.txt).

"2" position is blank. I want to discover position "2" (Line 2)

fid = fopen('T.txt','r');

tline = fgetl(fid);

?

-----------------------------------------------------------------------

I'm about to discover that line two is empty.

What should I do?

Answer 1

[Chris]

if isempty(tline)
    % do something, or nothing?
end

[dmfwlansejr]

Yes, I found folowing method

for n=1:100

tline= fgetl(fid);

if isempty(tline)==1

Empty_line=n

end

end

But, my catched text data is data=';a;b;0110100...." <-I'm use [R,count] = fscanf(fid,'%s',inf);

original format is

;a

;b

;0

Empty line

1

1

0

.

.

.

[Chris]

I see both a loop, and an fscanf which reads the whole file. I will continue with the loop.

Try a while loop.

feof means "end of file". ~feof means the loop hasn't finished reading the file yet.

First initialize some empty variables, and iterate or concatenate them in the loop.

n = 0;
Empty_line = [];
data = strings(0);

fid = fopen('T.txt','r');
while ~feof(fid)
    n = n+1;
    tline = fgetl(fid);
    if isempty(tline)==1
        % One way to concatenate:
        Empty_line = cat(1, Empty_line, n);
    else
        % Another way to concatenate:
        data = [data; tline];
    end
end
fclose(fid);

For the data, you could use a string array, and concatenate. Before the loop, initialize it with