fopen user guide in MATLAB
2015-10-21 15:10
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refer to: http://cn.mathworks.com/help/symbolic/mupad_ref/fopen.html
And: http://cn.mathworks.com/help/matlab/ref/fopen.html
Syntax
fopen([code]filename | TempFile, <
Read | Write | Append>, <
Bin | Text | Raw>, <
Encoding = "encodingValue">)
[/code]
Bin, Raw, Text | With Bin, the data is stored in MuPAD internal binary format. With Text, the data may be strings or MuPAD objects stored as text. Newlines are handled according to the conventions of the operating system at hand. With Raw, the data is interpreted as binary machine numbers. See the functions readbytesand writebytes. If the mode is Reador Append, the default is the format of the data in the existing file. If the mode is Write, the default is Bin. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Encoding | This option lets you specify the character encoding to use. The allowed encodings are:
The default encoding is system dependent. If you specify the encoding incorrectly, characters might read incorrectly. Characters unrecognized by the encoding are replaced by the default substitution character for the specified encoding. Encodings not listed here can be specified but might not produce correct results. |
Return Values
a positive integer: the file descriptor.FAILis returned if the file cannot be opened.
Example
To specify the encoding to read and write data, useEncoding. The
Encodingoption applies only to text files that are opened using a file name and not a file descriptor. Create a temporary file and write the string
"abcäöü"
in the encoding
"UTF-8":
fid := fopen(TempFile, Text, Write, Encoding="UTF-8"): file := fname(fid): fprint(Unquoted, fid, "abcäöü"): fclose(fid):
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