Data

scalar

Single-channel numeric time-series. One value per timestamp. Use for battery voltage, gripper force, CPU utilization, any 1-D scalar signal.

Chunk format

Format: jsonl
Decoder: jsonlDecoder

JSONL shape

{
  ts: number   // seconds from episode start
  data: number // the scalar value
}

Field	Type	Required	Notes
`ts`	`number`	yes	Monotonically increasing; may be fractional.
`data`	`number`	yes	The scalar sample value.

Sample data

{"ts": 0.000, "data": 12.3}
{"ts": 0.100, "data": 12.5}
{"ts": 0.200, "data": 12.4}
{"ts": 0.300, "data": 12.7}

Sample m3u8

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:5
#EXTINF:5.000,
chunk-001.jsonl
#EXTINF:5.000,
chunk-002.jsonl
#EXT-X-ENDLIST

Compatible timeline lanes

Lane	Notes
`LineChartLane`	Default. Single curve.

Compatible standalone views

View	Notes
`BarTrackView`	Generic N-channel bar display; works with any `continuous` dtype.

Default props

None. Specify range or unit via TrackRow.props if needed.

Python generator

import numpy as np
from dreamlake import Episode
 
ep = Episode.create("ep1")
voltage = ep.track("power/battery_voltage", dtype="scalar")
 
t = 0.0
while t < 30.0:
    v = 12.0 + 0.5 * np.sin(t)
    voltage.append({"ts": t, "data": v})
    t += 0.01

registerDtype override

registerDtype({
  id: 'scalar',
  name: 'Scalar',
  defaults: { range: [0, 100], unit: '%' },  // common for utilization-style scalars
})