To save the matrix listed as fread as stl file?

I changed the stl file of the triangulation to the decimal form through the spread, is there a separate way to change the decimal form back to the stl file?

here my code.

r = fopen('Mesh_04.stl'); 
A=fread(r);
fclose(r);
whos A
  Name           Size              Bytes  Class     Attributes

  A         137784x1             1102272  double              

I want to know how to convert decimal form(A) back to stl file.

And I tried to use the function of the site below, but frankly, I have difficulty setting the variable.

Can you help me if you know?

https://kr.mathworks.com/matlabcentral/fileexchange/20922-stlwrite-write-ascii-or-binary-stl-files

Answer 1

[Walter Roberson]

fid = fopen('New_Mesh_04.stl', 'w');
fwrite(fid, A, 'uint8');
fclose(fid)

[Jungwu Kim]

I tried but that code had error with below

Error occurred during use: fwrite

The precision is not valid.

[Walter Roberson]

Please check your typing. The command works.

A = randi([0 255], 512, 1);

fid = fopen('New_Mesh_04.stl', 'w');
fwrite(fid, A, 'uint8');
fclose(fid)

ans = 0

!ls -l New_Mesh_04.stl

-rw-r--r-- 1 mluser worker 512 Dec 17 03:52 New_Mesh_04.stl

In particular, check in case you accidentally used unit8 instead of uint8

[Jungwu Kim]

thank you! I think I misused your point.