fwrite

I tried to use fwrite which is described as saving in binary form but it saved it in numbers. At least my attempt did:

Created a new file rain2.tv and atached too numbers to it and read it afterwards:

>> fid=fopen('rain2.tv','w')

fid =

     3

>> fwrite(fid, '2 4')

ans =

     3

When i open the file rain2.tv it is in normal numbers not binary and when I look at the saved file it is also saved in normal

Answer 1

[Titus Edelhofer]

Hi Tor,

1) you save strings 2,4, not values (pass [2 4] instead of '2 4' to fwrite

2) you should pass the format ('double'), see fwrite doc

Titus

[Tor Fredrik Hove]

I have read doc fwrite but I can't seem t oget a specific example. I have written:

>> fid=fopen('rain2.tv','w')

fid =

3

>> fwrite(fid, [1 2])

ans =

2

>> fclose(fid)

ans =

0

>> fopen('rain2.tv')

ans =

3

>> while ~feof(fid)

fgetl(fid)

end

ans =

>>

the ans is empty and noting is saved in the file

[Walter Roberson]

The ans is not empty: I can see from what you posted that it contains two characters, binary 1 and binary 2.

fgetl() is used for reading *text*, not for reading binary. You would use fread() to read binary.

fread(fid)