What does fopen ('text.txt', 'wt') mean in MATLAB?

Question

I tried help fopen ,

but there is no explanation of what t means.

Answer 1

From the documentation (R2009a, Windows):

On UNIX systems, binary and text modes are the same.

On Windows systems, binary and text modes are different. If you are not sure which mode is best for your file, use binary mode. By default, fopen files are opened for binary read access.

In binary mode, reading and writing operations process all characters in the same way. In text mode:

• Read the operations in which carriage returns are encountered, followed by a new line character that removes carriage returns from input.

• Write operations insert a carriage return before any newline in the input.

On UNIX version (R2009b) it is added (in doc fopen ):

For better performance, do not use text mode.

Answer 2

It is similar to PHP and other languages ​​in that t stands for text mode; however, the meaning is slightly different.

In MATLAB, if you open a file in text mode, it breaks the ends of the lines from input before the lines are processed or processed, and then reads them for output; the binary mode indicated by b does not overwrite such a string.

See the fopen link .

Answer 3

from matlab fopen documentation

To open files in text mode, attach the letter "t" to the resolution, for example, "rt" or "wt +". For best performance, do not use text mode. On Windows systems, the following applies in text mode:

• Reading operations that occur with carriage returns followed by a newline ('\ r \ n') removes the carriage return from the input.

• Write operations insert a carriage return before any newline in the output file.

This additional processing in most cases is not needed. All MATLAB import functions and most text editors (including Microsoft Word and WordPad) recognize both "\ r \ n" and "\ n" as newline sequences. However, when you create files for use with Microsoft Notepad, complete each line with "\ r \ n". For example, see Fprintf.

Answer 4

Stolen from PHP documentation [yes, this is a different language, but we are talking about the filemode parameter, so it should not be different)

Windows offers a text translation flag ('t') that will transparently translate \ n to \ r \ n when working with a file. Alternatively, you can also use 'b' for forced binary mode, which will not broadcast your data. To use these flags, specify either "b" or "t" as the last character of the Parameter mode.

....

Again, for portability, it is also highly recommended that you rewrite code that uses or relies on 't' so that it uses the correct endings and 'b' line.

http://php.net/manual/en/function.fopen.php