appending a file

Asked by lowcalorie on 15 Mar 2012

813 views (last 30 days)

i have a file called hello.txt using wordpad which contains the matrix

2 7 3

2 6 9

now i have a vector v = [1 2 3] and i want to add this vector to the hello.txt file so when i open the hello.txt file i should have

2 7 3

2 6 9

1 2 3

how can i do this

0 Comments

2 Answers

Link

Answer by Walter Roberson on 15 Mar 2012

Accepted Answer

fid = fopen('hello.txt', 'a+');
fprintf(fid, '%d %d %d\n', v);
fclose(fid);

4 Comments

Show 1 older comment

Walter Roberson on 15 Mar 2012

Change the 'a+' to 'at'

And while you are at it, switch to a more modern text editor ;-)

Walter Roberson on 15 Mar 2012

See, Jan, people do still use WordPad and still need the 't' permissions ;-)

Walter Roberson on 15 Mar 2012

>> !cat hello.txt

2 7 3

2 6 9

>> fid = fopen('hello.txt','at')

fid =

>> v = [1 2 3]

v =

1 2 3

>> fprintf(fid, '%d %d %d\n', v);

fclose(fid);

>> !cat hello.txt

2 7 3

2 6 9

1 2 3

Link

Answer by Walter Roberson on 15 Mar 2012

Your existing question is still here and still active. Please do not open duplicate questions: it just leads to frustration and confusion.

If you require answers within 10 minutes (as implied by the time between your reply here and the time you opened the duplicate question), then you should be hiring a consultant.

1 Comment

Wayne King on 15 Mar 2012

I second Walter's sentiment. People are volunteering their time to help you.

You are now following this question

lowcalorie (view profile)

appending a file

lowcalorie (view profile)