call recursive fun. erase txtfile

hi, I i have recursive function , each time call this function return different array.

I want to print these arrays into txt file, it is important to me store all arrays. But the problem each time is called function will erase the txtfile.

What I have to do to save all arrays?

THANKS IN ADVANCCE

Answer 1

[Jan]

Main function, which opens and closes the file:

fid = fopen(FileName, 'w');
if fid == -1, error('Cannot open file'); end
Recursive(fid, 17);
fclose(fid);

And the recursice function:

function Recursive(fid, Num)
Num = Num - 1;
if Num == 0
  return;
end
fprintf(fid, '%d\n', Num);
Recursive(Num);
end

Or you open the file in the recursive function for appending:

function Recursive(Num)

fid = fopen(FileName, 'a');
if fid == -1, error('Cannot open file'); end
fprintf(fid, '%d\n', Num);
fclose(fid);

Num = Num - 1;
if Num > 0
  Recursive(Num);
end

[huda nawaf]

thanks, jan, each time call function will return vector with different length.

i tried to use structure as output of function , but i failed.

i need save this vector .is it best to save inside function or in main program.

i think your code will also erase what wrote in previose call. i need a way by which I do not lost the previose return.

thanks

[Jan]

You think that the code will erase the formerly written data? I suggest to try it instead. fopen(FileName, 'a') opens a file for appending...

[huda nawaf]

thanks i will try

[huda nawaf]

thanks jan, it is working now

Answer 2

[Azzi Abdelmalek]

maby your fclose(fid) is in the loop

fid = fopen('filename.txt', 'w');
for k=1:10
  v=(1:k), %example 
fprintf(fid, '%f\t',v);
fprintf(fid, '\n',[]);
end
fclose(fid);

[huda nawaf]

thanks, but i used recursive function. i want each time call this fun. do not loss the previose return . how can store the return values?

[huda nawaf]

this is my problem

I used recursive function F=devide() when run this function , the output:

cluster1 =

     1     2     4     5
     3     6     7     0
     1     2     0     0
     3     4     0     0
     1     0     0     0
     2     0     0     0

cluster1 =

     1     2     4     5
     3     6     7     0
     1     2     0     0
     3     4     0     0
     1     0     0     0
     2     0     0     0

cluster1 =

     1     2     4     5
     3     6     7     0
     1     2     0     0
     3     4     0     0

cluster1 =

     1     2     4     5
     3     6     7     0

F =

     1     2     4     5
     3     6     7     0

the problem in F , where F it must has the first array in output (6*4) and this array that must returned to main functon . But , in fact F has the last output the array 2*4. I can not control on output to make the last processing of array is what return to main program.

thanks

[Azzi Abdelmalek]

if you post your function, it will be helpfull

[Azzi Abdelmalek]

I think you can add this code inside your function just after cluster1

fprintf(fid, '%f\t',cluster1);
fprintf(fid, '\n',[]);

and call your function

fid = fopen('filename.txt', 'w');
F=devide();
fclose(fid);

[huda nawaf]

thanks, do u mean open file in main program?

I will try do that. if I failed , I will send my code.

thanks again