# fwrite

## Purpose

Write binary data from a MATLAB matrix to a file.

## Synopsis

    count = fwrite(fid,A,'precision')

## Description

`count = fwrite(fid,A,'precision')` writes the elements of matrix `A` to the specified file, translating MATLAB values to the specified `precision`. The data are written to the file in column order. `fid` is a integer file identifier obtained from `fopen`. `count` is the number of elements successfully written.

The `'precision'` argument specifies the numeric precision of the data. See `fread` for a list of valid `precision` strings.

## See Also

    fclose, ferror, fopen, fprintf, fread, fscanf, fseek, ftell, sprintf,
    sscanf

(c) Copyright 1994 by The MathWorks, Inc.