CODEWITHSUNDEEP
matlab
learningMatlab
learningMatlab

Reputation: 229

how to textscan to read all the lines in a file

I am trying to read all the lines in a .m file with the following 

file_content = textscan(fid, '%s', 'delimiter', '\n', 'whitespace', '')

but this just returns 

file_content = 

    {0x1 cell}

when actually my file has 224 line. so if i use 

file_content = textscan(fid,'%s',224,'delimiter','\n')

i get all the lines

file_content = 

    {224x1 cell}

what will be a more proper way to read all the data(mostly strings) in a .m file? thanks

Upvotes: 5

Views: 39209

Answers (3)

Aaditya Kalsi
Aaditya Kalsi

Reputation: 1049

That call to textscan means "read everything up to a \n".

In general your file may have mixed line endings, or none at all and have records separated by ':' or something.

Upvotes: 2

carlosdc
carlosdc

Reputation: 12152

Since you do not list your needs (are you reading a huge file?, many small files? is speed an issue? what do you really want to do?) I'm giving you the simplest possible answer:

You do this:

f = fopen('data.txt');             
g = textscan(f,'%s','delimiter','\n');
fclose(f);

remember to close after reading, because otherwise you won't be able to read again.

You can get the first line as g{1}{1}, the second as g{1}{2} and so on.

Here is the matlab documentation for textscan which gives a lot more details.

Upvotes: 4

Gautam
Gautam

Reputation: 2753

Here's a method that worked for me: 

fid = fopen('filename','r'); %opening in read mode (default)
inter = textscan(fid,'%[^\n]'); 
lines = inter{1,1};
fclose(fid);

This command reads the whole file 'line by line'. for example, I had a text file with 1332 lines, this code creates a variable inter which is a {1,1 cell} and lines which is a [1x102944 char].

I'm not sure why/how this works (it'd be great if someone else reading this knows how!) but it works for my program.

Upvotes: 3

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