#1377 Gnuplot for windows thousands separator in "set format"


Gnuplot 4.6.3 running on windows 7 does not working with "set format y "%'12.0f"". On linux version running on SUSE Linix Enterprise Server it works fine - thousands separator ' (an apostrophe) is appearing on Y tics (set ytics). On windows version i see only %'12.0f on Y label.


  • Ethan Merritt

    Ethan Merritt - 2014-04-10

    gnuplot passes the format to the c library function snprintf(), which is supposed to apply locale-dependent conversions and numerical conventions. As you say, this works on linux systems.

    For reasons unknown to me, MicroSoft does not provide a C-standard snprintf. MSVC has instead a function _snprintf that is sort of the same but not quite, and mingw adds a further layer ms_snprintf.

    Furthermore locale support under Windows also seems to work differently in practice. So it is possible that the snprintf/ms_snprintf/_snprintf stack would handle it properly if the locale were set a little differently.

    All of which is a long way of saying "we rely on the c library for this feature". The quirks of your local c library will vary. Was your gnuplot built with mingw or MSVC or something else entirely? What c library is it linked against?

  • Bastian Märkisch

    In fact the ' printf operator is non-standard. It is not supported by the Windows C runtime msvcrt.dll. MinGW has it's own versions of printf and friends which may or may not support this operator, but the gnuplot 4.6.3 binary was built without this.

  • Ethan Merritt

    Ethan Merritt - 2014-05-27
    • status: open --> closed-wont-fix

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