plotting fan speed/percentage

[jandechent]

im looking for a one liner to plot the percentage attribute of a fan entity (fan.myfan) - multiplied by the on off state of the entity itself. Because, home assistant keeps the percentage unchanged if you switch it off (to restore). But for plotting this is a bit bad.

[jandechent]

had a stupid typo (attributes instead of attribute)

entities:
  - entity: fan.kamin_fan_office_roof
    attribute: percentage
    yaxis: y2
    name: per
    line:
      color: gray
    filters:
      - fn: |-
          ({xs, ys, vars, meta, states, statistics, hass}) => { 
          vars.myVar=states;
            return {
               ys: states.map(s=>(s.state=="on"?1:0)*s.attributes.percentage),
               xs: xs
             };}