tickFormat

This attribute can change a numerical tick value to a formatted number by the given string specifier. The general form of a specifier is:

[[fill]align][sign][symbol][0][width][,][.precision][~][type]

The fill can be any character. The presence of a fill character is signaled by the align character following it, which must be one of the following:

• > - Forces the field to be right-aligned within the available space. (Default behavior).
• < - Forces the field to be left-aligned within the available space.
• ^ - Forces the field to be centered within the available space.
• = - like >, but with any sign and symbol to the left of any padding.

Thesign can be:

• - - nothing for zero or positive and a minus sign for negative. (Default behavior.)
• + - a plus sign for zero or positive and a minus sign for negative.
• ( - nothing for zero or positive and parentheses for negative.
• (space) - a space for zero or positive and a minus sign for negative.

The symbol can be:

• $ - apply currency symbols per the locale definition.
• # - for binary, octal, or hexadecimal notation, prefix by 0b, 0o, or 0x, respectively.

The zero (0) option enables zero-padding; this implicitly sets fill to 0 and align to =. The width defines the minimum field width; if not specified, then the width will be determined by the content. The comma (,) option enables the use of a group separator, such as a comma for thousands.

Depending on the type, the precision either indicates the number of digits that follow the decimal point (types f and %), or the number of significant digits (types `,e,g,r,sandp). If the precision is not specified, it defaults to 6 for all types except (none), which defaults to 12. Precision is ignored for integer formats (typesb,o,d,x, andX) and character data (typec`). See precisionFixed and precisionRound for help picking an appropriate precision.

The ~ option trims insignificant trailing zeros across all format types. This is most commonly used in conjunction with types r, e, s and %. For example:

The available type values are:

• e - exponent notation(eg. 1.23e+2).
• E - exponent notation(eg. 1.23 x 10²).
• f - fixed point notation.
• g - either decimal or exponent notation, rounded to significant digits.
• r - decimal notation, rounded to significant digits.
• s - decimal notation with an SI prefix, rounded to significant digits.
• % - multiply by 100, and then decimal notation with a percent sign.
• p - multiply by 100, round to significant digits, and then decimal notation with a percent sign.
• b - binary notation, rounded to integer.
• o - octal notation, rounded to integer.
• d - decimal notation, rounded to integer.
• x - hexadecimal notation, using lower-case letters, rounded to integer.
• X - hexadecimal notation, using upper-case letters, rounded to integer.
• c - character data, for a string of text.

The type ` (none) is also supported as shorthand for~g(with a default precision of 12 instead of 6), and the typenis shorthand for,g. For theg,nand ` (none) types, decimal notation is used if the resulting string would have precision or fewer digits; otherwise, exponent notation is used. For example:

Examples

• e - exponent notation.

• E - exponent notation.

• f - fixed point notation.

• g - either decimal or exponent notation, rounded to significant digits.

• r - decimal notation, rounded to significant digits.

• s - decimal notation with an SI prefix, rounded to significant digits.

  • y - yocto, 10⁻²⁴
  • z - zepto, 10⁻²¹
  • a - atto, 10⁻¹⁸
  • f - femto, 10⁻¹⁵
  • p - pico, 10⁻¹²
  • n - nano, 10⁻⁹
  • µ - micro, 10⁻⁶
  • m - milli, 10⁻³
  • (none) - 10⁰
  • k - kilo, 10³
  • M - mega, 10⁶
  • G - giga, 10⁹
  • T - tera, 10¹²
  • P - peta, 10¹⁵
  • E - exa, 10¹⁸
  • Z - zetta, 10²¹
  • Y - yotta, 10²⁴

• % - multiply by 100, and then decimal notation with a percent sign.

tickValues

This attribute is used to set specific tick values according to a given string specifier, containing numerical tick values separated by comma.