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Please note that the recommended version of Scilab is 6.1.1. This page might be outdated.
However, this page did not exist in the previous stable version.

Scilab help >> Files : Input/Output functions > fprintf


Emulator of C language fprintf function. This function is obsolete.

Calling Sequence

fprintf(file, format, value_1, ..., value_n)



a Scilab string. It specifies a character string combining literal characters with conversion specifications.


specifies the data to be converted according to the format parameter.


a Scilab string specifying a file name or a logical unit number (see file)

Note that if file=0, the message will be display on standard error stream (stderr).


This function is obsolete and will be removed in Scilab 5.5.0, use preferabily the mfprintf function which is much more compatible with the C fprintf functionalities.

The fprintf function converts, formats, and writes its value parameters, under control of the format parameter, to the file specified by its file parameter.

The format parameter is a character string that contains two types of objects:

Literal characters

which are copied to the output stream.

Conversion specifications

each of which causes zero or more items to be fetched from the value parameter list. See printf_conversion for details.

If any values remain after the entire format has been processed, they are ignored.


u=file('open',fullfile(TMPDIR,'results'),'unknown') //open the result file
for tk=t
  fprintf(u,'time = %6.3f value = %6.3f',tk,sin(tk)) // write a line
file('close',u) //close the result file

fprintf(0,'My error which is going to be displayed on the stderr')


5.4.1 Function tagged as obsolete. Will be removed in 5.5.0.

See Also

  • mfprintf — converts, formats, and writes data to a file
  • string — conversion to string
  • print — prints variables in a file
  • write — write in a formatted file
  • format — number printing and display format
  • disp — displays variables
  • file — file management
  • mprintf — converts, formats, and writes data to the main scilab window
  • msprintf — converts, formats, and writes data in a string
  • printf_conversion — mprintf, msprintf, mfprintf conversion specifications
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Last updated:
Tue Apr 02 17:36:22 CEST 2013