fscanf

Reads data from a file.

📝 Syntax

• R = fscanf(fid, format)

• [R, count] = fscanf(fid, format)

• [R, count] = fscanf(fid, format, sizeR)

📥 Input argument

• fid - a file descriptor

• format - a string describing the format to used function.

• sizeR - desired dimensions of R.

📤 Output argument

• R - matrix or character vector.

📄 Description

Read data in text from the file specified by the file descriptor fid.

characters encoding uses fopen parameter.

Value type	format	comment
Integer	%i	base 10
Integer signed	%d	base 10
Integer unsigned	%u	base 10
Integer	%o	Octal (base 8)
Integer	%x	Hexadecimal (lowercase)
Integer	%X	Hexadecimal (uppercase)
Floating-point number	%f	Fixed-point notation
Floating-point number	%e	Exponential notation (lowercase)
Floating-point number	%E	Exponential notation (uppercase)
Floating-point number	%g	Exponential notation (compact format, lowercase)
Floating-point number	%G	Exponential notation (compact format, uppercase)
Character	%c	Single character
String	%s	Character vector.

💡 Example

M = rand(3, 2);
fw = fopen([tempdir, 'example_fscanf.txt'], 'wt');
fprintf(fw, "%f %f %f", M);
fclose(fw);

fd = fopen([tempdir, 'example_fscanf.txt'], 'r');
R = fscanf(fd, "%g %g %g");
fclose(fd);
R

🔗 See also

fopen, fprintf, dlmwrite.

🕔 History

Version	📄 Description
1.0.0	initial version