fwrite

fwrite writes data into a file.

n = fwrite(fh, ssType, dat)

n = fwrite(fh, dat)

n = fwrite_char(fh, dat)

n = fwrite_char8(fh, dat)

n = fwrite_float64(fh, dat)

n = fwrite_float32(fh, dat)

n = fwrite_int8(fh, dat)

n = fwrite_uint8(fh, dat)

n = fwrite_int16(fh, dat)

n = fwrite_uint16(fh, dat)

n = fwrite_int32(fh, dat)

n = fwrite_uint32(fh, dat)

n = fwrite_int64(fh, dat)

n = fwrite_uint64(fh, dat)

Return Value

n is the number of elements written.

Parameters

fh

Identifies the file.

ssType

ssType is one of the following strings:

Value	Meaning
“double”	(8 Bytes)
“real48”	(6 Bytes)
“float”	(4 Bytes)
“char”	(1 Bytes)
“char8”	(1 Bytes)
“uchar”	(1 Bytes)
“int”	(4 Bytes)
“uint”	(4 Bytes)
“long”	(4 Bytes)
“ulong”	(4 Bytes)
“short”	(2 Bytes)
“ushort”	(2 Bytes)

dat

Example

fh = fopen("/test.bin", "w");
rvValues = 1:100;              // 1,2,3,4,...
fwrite(fh, "short", rvValues); // writes 100 short values
fclose(fh);
fh = fopen("/test.bin", "r");
rvValues = fread(fh, "short", 100); // reads 100 short values
fclose(fh);

History

Version	Description
5.9.0	New type “char8”.

See also

Overview Binary and Text Files, fopen, fread

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