Line Chart

The Line Chart view in Trendz plots numeric telemetry over time. It shares its axis and series model with the Bar Chart — the same three sections control what appears on each axis and how data is grouped.

Video tutorial

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Video: https://www.youtube.com/watch?v=v2pZKQhiw8s

Chart sections

Line and Bar charts use three configurable drop zones:

Section	Purpose
X-axis	Horizontal axis — usually a Date field, but can be any field or combination of fields
Y-axis	Vertical axis — drop one or more numeric telemetry fields here with the required aggregation
Series	Split data into groups — each group becomes a separate line

Simple line chart

Drop a Date field onto X-axis and a numeric telemetry field onto Y-axis. Leave Series empty. Trendz plots one line for each entity that has data in the selected time range.

Line chart with series

Multiple telemetry fields as separate lines

To plot several telemetry fields for the same device or asset on a single chart, add each field to Y-axis and leave Series empty. Use Filter to focus on a specific device.

  Y-axis: [ temperature ] [ humidity ] [ pressure ]
  Series: (empty)

  ──────────────────────────────────────────────▶ time
    temperature  ────────────────────
    humidity     ·················
    pressure     ─ ─ ─ ─ ─ ─ ─ ─ ─

Line chart with multiple telemetry fields each plotted as a separate line

Groups as series

To compare the same telemetry across different devices, assets, or categories, add a grouping field (such as a device name or asset attribute) to the Series section. Trendz draws one line per group.

  Y-axis:  [ energy_consumption ]
  Series:  [ building name ]

  ──────────────────────────────────────────────▶ time
    Building A   ────────────────────
    Building B   ·················
    Building C   ─ ─ ─ ─ ─ ─ ─ ─ ─

Line chart with building names as series — one line per building

Combined field example — energy consumption by quarter split by day of week

Color zones

Color zones mark threshold regions on the chart background to make it immediately visible when a value crosses a limit. Thresholds are static values set at design time.

Open the Settings card for the view.
Go to the Annotation section.
Choose a value and a color, then click OK.
Click Build Report.

You can add multiple color zones to a single chart.

Line chart with color zone background annotations marking thresholds

Color zone configuration panel in the Annotation settings

Mixed charts

A mixed chart overlays columns, lines, and areas on a shared X-axis, with a separate Y-axis scale for each component. This is useful when combining fields with different units or magnitudes.

Open the settings card for the telemetry field you want to change.
Choose the chart type: Area, Line, or Bar.

Mixed chart combining bar columns and a line overlay

Per-field chart type selector showing Area, Line, and Bar options

Y-axis control

By default each field on the Y-axis gets its own axis — three fields means three Y-axes on the chart, with the additional axes placed on the right side. When all fields share the same unit, you can merge them onto a single axis.

Open View Settings.
Enable Single axis.

Line chart with all Y-axis fields merged onto a single axis

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