fread

Read data in binary form to the file specified by the file descriptor fid.

Syntax

• res = fread(fid)
• res = fread(fid, sz, precision)
• res = fread(fid, sz, precision, skip)
• res = fread(fid, sz, precision, arch)
• res = fread(fid, sz, precision, skip, arch)
• [res, count] = fread(fid, sz, precision, skip, arch)

Input argument

• fid - a file descriptor
• sz - Dimensions of output array: scalar, [m,n] or [m, Inf]
• precision - class of values to read
• skip - number of bytes to skip
• arch - a string specifying the data format for the file.

Output argument

• res - a vector of floating point or integer type numbers
• count - number of characters reads into res

Description

Read data in binary form to the file specified by the file descriptor fid.

supported architecture:

native , n: format of the current machine.

ieee-be, b: IEEE big endian.

ieee-le, l: IEEE little endian.

characters encoding uses fopen parameter.

Examples

A = rand(3,1)
fileID = fopen([tempdir(), 'doubledata.bin'],'w');
fwrite(fileID, A,'double');
fclose(fileID);

fileID = fopen([tempdir(), 'doubledata.bin'],'r');
R = fread(fileID, 'double')
fclose(fileID);

fileID = fopen([tempdir(), 'uint16nine.bin'],'w');
fwrite(fileID,[1:9],'uint16');
fclose(fileID);

fileID = fopen([tempdir(), 'uint16nine.bin'],'r');
A = fread(fileID,[4,Inf],'uint16')
fclose(fileID);

See also

fopen, fclose, fwrite.

History

Author

Allan CORNET