Format specifiers

Tic-mark label numerical format specifiers | |

Format | Explanation |

`%f` |
floating point notation |

`%e` or `%E` |
exponential notation; an "e" or "E" before the power |

`%g` or `%G` |
the shorter of `%e` (or `%E` ) and `%f` |

`%x` or `%X` |
hex |

`%o` or `%O` |
octal |

`%t` |
mantissa to base 10 |

`%l` |
mantissa to base of current logscale |

`%s` |
mantissa to base of current logscale; scientific power |

`%T` |
power to base 10 |

`%L` |
power to base of current logscale |

`%S` |
scientific power |

`%c` |
character replacement for scientific power |

`%P` |
multiple of pi |

A 'scientific' power is one such that the exponent is a multiple of three.
Character replacement of scientific powers (** "%c"**) has been implemented
for powers in the range -18 to +18. For numbers outside of this range the
format reverts to exponential.

Other acceptable modifiers (which come after the `"`%`"` but before the format
specifier) are `"`-`"`, which left-justifies the number; `"`+`"`, which forces all
numbers to be explicitly signed; `"` `"` (a space), which makes positive numbers
have a space in front of them where negative numbers have `"`-`"`;
`"`#`"`, which places a decimal point after
floats that have only zeroes following the decimal point; a positive integer,
which defines the field width; `"`0`"` (the digit, not the letter) immediately
preceding the field width, which indicates that leading zeroes are to be used
instead of leading blanks; and a decimal point followed by a non-negative
integer, which defines the precision (the minimum number of digits of an
integer, or the number of digits following the decimal point of a float).

Some systems may not support all of these modifiers but may also support others; in case of doubt, check the appropriate documentation and then experiment.

Examples:

set format y "%t"; set ytics (5,10) # "5.0" and "1.0" set format y "%s"; set ytics (500,1000) # "500" and "1.0" set format y "%+-12.3f"; set ytics(12345) # "+12345.000 " set format y "%.2t*10^%+03T"; set ytic(12345)# "1.23*10^+04" set format y "%s*10^{%S}"; set ytic(12345) # "12.345*10^{3}" set format y "%s %cg"; set ytic(12345) # "12.345 kg" set format y "%.0P pi"; set ytic(6.283185) # "2 pi" set format y "%.0f%%"; set ytic(50) # "50%"

set log y 2; set format y '%l'; set ytics (1,2,3) #displays "1.0", "1.0" and "1.5" (since 3 is 1.5 * 2^1)

There are some problem cases that arise when numbers like 9.999 are printed with a format that requires both rounding and a power.

If the data type for the axis is time/date, the format string must contain
valid codes for the 'strftime' function (outside of **gnuplot**, type `"`man
strftime`"`). See **set timefmt (p. )** for a list of the allowed input format codes.