15 minutes averaging

[dbuezas]

type: custom:plotly-graph
entities:
  - entity: sensor.sonoff_rf_gateway_temperature_2
    line: 
      shape: spline # https://plotly.com/javascript/reference/scatter/#scatter-line-shape
    lambda: |- 
      (ys, xs) => {
        const MINUTES = 15 // <-- change here

        const window_size_ms = 1000*60*MINUTES 
        const result = {x:[], y:[]}
        let x_next = +xs[0] + window_size_ms
        let y_accum = 0
        let y_count = 0
        for (let i = 0; i < xs.length; i++) {
          const x = +xs[i]
          const y = +ys[i]
          if (x>x_next){
            result.y.push(y_accum/y_count)
            result.x.push(new Date(x_next))
            y_accum = 0
            y_count = 0
            x_next = +x + window_size_ms
          }
          if (y){
            // ignore unavailable/unknown state points
            y_accum += y
            y_count ++
          }
        } 
        return result;
      }
hours_to_show: 24
refresh_interval: 0

[conrad66]

How is it possible to round the average value to 1-2 decimal places ?

[dbuezas]

Replace result.y.push(y_accum/y_count) with result.y.push(Math.round(y_accum/y_count * 100) / 100)
(edit: removed a dangling parenthesis)

[Photelegy]

Did this work for you?
Somehow when I include this rounding it doesn't work anymore.

type: custom:plotly-graph
entities:
  - entity: sensor.disk_use
    name: Disk use (2h mean)
    lambda: |-
      (ys, xs) => {
        const HOURS = 2
        const window_size_ms = 1000*60*60*HOURS 
        const result = {x:[], y:[]}
        let x_next = +xs[0] + window_size_ms
        let y_accum = 0
        let y_count = 0
        for (let i = 0; i < xs.length; i++) {
          const x = +xs[i]
          const y = +ys[i]
          if (x>x_next){
            result.y.push(Math.round(y_accum/y_count * 10) / 10))
            result.x.push(new Date(x_next))
            y_accum = 0
            y_count = 0
            x_next = +x + window_size_ms
          }
          if (y){
            // ignore unavailable/unknown state points
            y_accum += y
            y_count ++
          }
        } 
        return result;
      }
hours_to_show: 1440
refresh_interval: 0
title: Speicher
layout:
  height: 400
  margin:
    t: 80
    l: 40
    r: 15
  xaxis:
    rangeselector:
      'y': 1.05
      buttons:
        - count: 12
          step: hour
        - count: 1
          step: day
        - count: 2
          step: day
        - count: 7
          step: day
        - count: 14
          step: day
        - count: 1
          step: month
        - count: 2
          step: month
        - count: 6
          step: month
  yaxis:
    fixedrange: false
    range:
      - 10
      - 15
defaults:
  entity:
    show_value:
      right_margin: 3
    line:
      shape: spline

What am I doing wrong?

[dbuezas]

one closing parenthesis too many. My fault.
Pro tip: open de chrome dev console and you will see the exception. You can click on the link to the right and see the code that had the error.