How do i write a text..

I wrote this code and i would like to write a text on the top of this file and on the bottom. How can i do this?

      grayImage = imread('moon.tif');
[height, width] = size(grayImage)
[X, Y] = meshgrid(1:width, 1:height);
numberOfPixels = length(X(:))
points = [X(:) Y(:) grayImage(:)];
A = [X(:) Y(:) grayimage(:)];
fid = fopen('moon.txt','wt');

for ii = 1:size(A,1)
  fprintf(fid,'%g\t',A(ii,:));
  fprintf(fid,'\n');
end
fclose(fid)

Answer 1

[Image Analyst]

Simply add a fprintf() before and after you write the gray levels to the text values.

fid = fopen('moon.txt','wt');
fprintf(fid,'Stuff at the beginning of the file.\n');
for ii = 1:size(A,1)
  fprintf(fid,'%g\t',A(ii,:));
  fprintf(fid,'\n');
end
fprintf(fid,'Stuff at the end of the file.\n');
fclose(fid)

[George]

I would like to write all of them in the same file e.g.

Stuff at the beginning of the file

1 1 255

1 2 200

Stuff at the end of the file

[Image Analyst]

Why is it that you think the text lines are written to different files than the pixel values? They aren't. They ARE written to the same file.

[George]

i write this code and when i open the moon.txt file i see only the pixel values
grayImage = imread('moon.tif');
[height, width] = size(grayImage)
[X, Y] = meshgrid(1:width, 1:height);
numberOfPixels = length(X(:))
points = [X(:) Y(:) grayImage(:)];
A = [X(:) Y(:) grayImage(:)];
fid = fopen('moon.txt','wt');
fprintf('Stuff at the beginning of the file.\n');
for ii = 1:size(A,1)
fprintf(fid,'%g\t',A(ii,:));
fprintf(fid,'\n');
end
fprintf('Stuff at the end of the file.\n');
fclose(fid)

[Image Analyst]

Sorry - forgot to add that you need to pass in the file ID. See corrected code. If you don't have that it just prints to the command window.

[George]

thank you for your time!