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#### 3.24.23.2 format specifiers

The acceptable formats (if not in time/date mode) are:

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 timefmt for a list of the allowed input format codes.

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