专用轴跳动

此示例演示如何创建自定义 TickFormatter 类，该类按原样显示每个轴的第一个记号，并将每个后续记号显示为与第一个轴的偏移。平移并缩放下面的绘图并观察x轴。

from bokeh.io import show
from bokeh.models import TickFormatter
from bokeh.plotting import figure
from bokeh.util.compiler import TypeScript

TS_CODE = """
import {TickFormatter} from "models/formatters/tick_formatter"

export class MyFormatter extends TickFormatter {
  // TickFormatters should implement this method, which accepts a list
  // of numbers (ticks) and returns a list of strings
  doFormat(ticks: string[] | number[]) {
    // format the first tick as-is
    const formatted = [`${ticks[0]}`]
    for (let i = 1, len = ticks.length; i < len; i++) {
      formatted.push(`+${(Number(ticks[i]) - Number(ticks[0])).toPrecision(2)}`)
    }
    return formatted
  }
}
"""


class MyFormatter(TickFormatter):

    __implementation__ = TypeScript(TS_CODE)


p = figure()
p.circle([1, 2, 3, 4, 6], [5, 7, 3, 2, 4], size=20)

p.xaxis.formatter = MyFormatter()

show(p)