Line Chart Component (a!lineChartField)

Charts

Line Chart Component

SAIL Design System guidance available for Charts

Every chart should tell a story. What does yours say? Learn how to build rich reporting dashboards that provide users with visualizations of their data.

Function

a!lineChartField( label, instructions, categories, series, xAxisTitle, yAxisTitle, yAxisMin, yAxisMax, referenceLines, showLegend, showDataLabels, showTooltips, allowDecimalAxisLabels, labelPosition, helpTooltip, showWhen, connectNulls, accessibilityText, colorScheme, height, xAxisStyle, yAxisStyle, data, config, refreshAlways, refreshAfter, refreshInterval, refreshOnReferencedVarChange, refreshOnVarChange, allowImageDownload )

Displays a series of numerical data as points connected by lines. Use a line chart to visualize trends of data that changes over time. This component can display thousands of data points without scrolling.

Users can easily find trends in their data by zooming in to a selected area to see additional details. See Display Date and Time Fields in a Line Chart example below.

When the chart shows date or date and time fields, the x-axis labels are formatted to match the end user's time zone and conveniently resize to avoid clutter.

If specific values are more important than the trend, consider using a column chart.

See also:

Parameters

Name	Keyword	Types	Description
Label	`label`	Text	Text to display as the field label.
Instructions	`instructions`	Text	Supplemental text about this field.
Categories	`categories`	List of Variant	Text, Date, or Date and Time array to display on the x-axis below each data point. If you are using an array of Date or Date and Time, make sure the data is sorted prior to using it as a category.
Series	`series`	List of LineChartSeries	Array of data series created with a!chartSeries().
X-Axis Title	`xAxisTitle`	Text	Title for the independent (horizontal) axis.
Y-Axis Title	`yAxisTitle`	Text	Title for the dependent (vertical) axis.
Min Y-Axis	`yAxisMin`	Number (Decimal)	Determines the minimum displayed point on the vertical axis.
Max Y-Axis	`yAxisMax`	Number (Decimal)	Determines the maximum displayed point on the vertical axis.
Reference Lines	`referenceLines`	List of Variant	Array of reference line values for each threshold to be defined on the chart. Configured using a!chartReferenceLine().
Show legend	`showLegend`	Boolean	Determines if a color legend displays below the chart. Default: `true`.
Show data labels	`showDataLabels`	Boolean	Determines if data values are displayed next to each data point. Default: `false`.
Show tooltips	`showTooltips`	Boolean	Determines if a tooltip displays the data value for each data point. Default: `true`.
Allow decimal axis labels	`allowDecimalAxisLabels`	Boolean	Allows dependent (vertical) values to display as decimal numbers instead of integers. Default: `false`.
Label Position	`labelPosition`	Text	Determines where the label appears. Valid values: `"ABOVE"` (default) Displays the label above the component. `"ADJACENT"` Displays the label to the left of the component. `"COLLAPSED"` Hides the label. The label will still be read by screen readers; see accessibility considerations for more information. `"JUSTIFIED"` Aligns the label alongside the component starting at the edge of the page.
Help Tooltip	`helpTooltip`	Text	Displays a help icon with the specified text as a tooltip. The tooltip displays a maximum of 500 characters. The help icon does not show when the label position is `"COLLAPSED"`.
Visibility	`showWhen`	Boolean	Determines whether the component is displayed on the interface. When set to false, the component is hidden and is not evaluated. Default: `true`.
Connect Null Data Points	`connectNulls`	Boolean	Determines whether to connect a graph line across null points, or render a gap between the two points on either side of the null. Default: `false`.
Accessibility Text	`accessibilityText`	Text	Additional text to be announced by screen readers. Used only for accessibility; produces no visible change.
Color scheme	`colorScheme`	Any type	Determines which color scheme to use in the chart. Use one of the following valid values: `"CLASSIC"`, `"MIDNIGHT"`, `"OCEAN"`, `"MOSS"`, `"BERRY"`, `"PARACHUTE"`, `"RAINFOREST"` (default), `"SUNSET"` or define a custom color scheme using a!colorSchemeCustom. See Chart Color Scheme for color scheme examples.
Height	`height`	Text	Determines the chart height. Valid values: `"MICRO"`, `"SHORT"`, `"MEDIUM"` (default), `"TALL"`. See Chart Heights for guidance on using the `"MICRO"` size.
X-Axis Style	`xAxisStyle`	Text	Determines how to display the labels and axis separators for the X-Axis. Valid values: `"STANDARD"` (default), `"NONE"`.
Y-Axis Style	`yAxisStyle`	Text	Determines how to display the labels, axis separators, and grid lines for the Y-Axis. Valid values: `"STANDARD"` (default), `"MINIMAL"`, `"NONE"`.
Data	`data`	Any type	Reference to the record type used for the source of this chart. Can accept a!recordData or a record type reference.
Chart Configuration	`config`	LineChartConfig	Configures how to display data on the chart, including fields used for calculations and grouping, using a!lineChartConfig().
Refresh Always	`refreshAlways`	Boolean	When true, chart data will be refreshed after each user interaction and each interval refresh. Default: `false`.
Refresh After	`refreshAfter`	List of Text String	Refreshes chart data each time a specified event completes. Valid values: `"RECORD_ACTION"`.
Refresh After an Interval of Time	`refreshInterval`	Number (Decimal)	How often chart data gets refreshed in minutes. When null, chart data will not be refreshed on an interval. Valid values: `"0.5"`, `"1"`, `"2"`, `"3"`, `"4"`, `"5"`, `"10"`, `"30"`, and `"60"`.
Refresh on Reference Variable Change	`refreshOnReferencedVarChange`	Boolean	When true, chart data will be refreshed each time the value of any variable referenced in the data parameter is updated. To refresh chart data when another variable that is not used in the data parameter changes, use `refreshOnVarChange`. Default: `true`.
Refresh on Variable Change	`refreshOnVarChange`	Any Type	Refreshes chart data each time any of these specific variables change. This allows you to refresh the chart data when a variable that is not referenced in the data parameter is updated. You can define a single variable (e.g. r`efreshOnVarChange: local!var1`) or a list of variables (e.g. `refreshOnVarChange: {local!var1, local!var2}`).
Allow Image Download	`allowImageDownload`	Boolean	Determines if the chart download button displays on the chart. Default: `false`.

Configuration

There are two ways to configure a line chart:

Set a record type as the data source and define fields to display on the chart.
Perform your own query and define lists of data within the categories and series.

If you have a record type that uses a database as the source, or a record type with data sync enabled, we recommend using the record type as the source of your chart. This configuration is easier because Appian will perform the query for you and display the results directly in the chart.

If your record type uses a web service as the source and does not have data sync enabled, use the categories and series to construct the chart manually.

Using record data

Configuring a line chart using a record type as the source requires using two parameters: data and config. Once you provide a record type in the data parameter and provide the fields in the config parameter, the chart displays the results.

See Chart Configuration Using Record Data for details on using a record type as the source. See Build Reports from Records for examples of reports created with different charts.

Using categories and series

When using categories and series, you must provide the list of data labels and values directly to these parameters.

Series

A single Series item produces a single line with line points for each categories item. Multiple series items produce multiple lines with one line for each series label item displayed in a distinct color and line points for each categories item with a different data marker shape (for example, square, circle, diamond) for each line.
Use a!chartSeries() to create the Chart Series array.
If a series data value is greater than the Max Y-Axis value or less than the Min Y-Axis value, the line continues off the chart, but the line point does not display.
If the series argument has a non-null label value paired with a 0, null, or empty data value, the data value still displays in the legend.
If the series argument has a null or empty label value paired with a non-null data value, the label value displays as [Series #] with # as the index number of the data value. For example, [Series 1].

Usage considerations

Chart data

If data values are small and less than a whole number, Appian recommends settings allowDecimalAxisLabels to true.
If data contains a!recordData or a record type reference, the categories and series parameters are ignored.

Chart line and background color

When the chart is placed in a colored card, the chart background will match the color of the card. Text labels and lines in the chart will also adjust if a dark background color is used. See the SAIL Design System for best practices on using charts with background colors.

Chart refresh behavior

You can define a!refreshVariable parameters directly in the chart without creating additional local variables. The only exception being refreshOnVarChange, which refreshes the chart after a specific local variable has changed.
When you use a record type as the source of your chart, use the refresh parameters in the chart instead of using local variables and the a!refreshVariable() function. This is because the refresh behavior will automatically apply to the fields specified in the data parameter of the chart.
If you're not using a record type as the source of your chart, it's recommended to use local variables and the a!refreshVariable() function to define refresh behavior since you won't use the data parameter to configure your chart.

Examples

Click EXPRESSION to copy and paste an example into the Interface Definition to see it displayed.

The examples below demonstrate how to configure your charts using categories and series. For examples on using record data, see Chart Configuration Using Record Data.

Single series line chart with label and instructions

a!lineChartField(
  label: "Annual Conference Registrants",
  instructions: "The number of registrations received for the annual conference each month.",
  categories: {"Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan", "Feb"},
  series: {
    a!chartSeries(label: "Sales", data: {72, 91, 93, 95, 92, 99, 98, 99, 79, 83, 90, 99})
  }
)

Displays the following:

screenshot of a line chart with a single series

Display date and time fields in a line chart

a!localVariables(
/* ~~~ Open vs. Closed Cases ~~~ /
/ Query for the count of Closed cases, aggregating by the date they were closed on. */
local!resolvedByDate: a!dataSubset(
data: {
{created_on: datetime(2019, 1, 1, 0, 0, 0, 0), id_count: 50},
{created_on: datetime(2019, 1, 2, 0, 0, 0, 0), id_count: 55},
{created_on: datetime(2019, 1, 3, 0, 0, 0, 0), id_count: 52},
{created_on: datetime(2019, 1, 4, 0, 0, 0, 0), id_count: 50},
{created_on: datetime(2019, 1, 5, 0, 0, 0, 0), id_count: 55},
{created_on: datetime(2019, 1, 6, 0, 0, 0, 0), id_count: 56},
{created_on: datetime(2019, 1, 7, 0, 0, 0, 0), id_count: 58},
{created_on: datetime(2019, 1, 8, 0, 0, 0, 0), id_count: 52},
{created_on: datetime(2019, 1, 9, 0, 0, 0, 0), id_count: 60},
{created_on: datetime(2019, 1, 10, 0, 0, 0, 0), id_count: 65},
{created_on: datetime(2019, 1, 11, 0, 0, 0, 0), id_count: 66},
{created_on: datetime(2019, 1, 12, 0, 0, 0, 0), id_count: 67},
{created_on: datetime(2019, 1, 13, 0, 0, 0, 0), id_count: 70},
{created_on: datetime(2019, 1, 14, 0, 0, 0, 0), id_count: 72},
{created_on: datetime(2019, 1, 15, 0, 0, 0, 0), id_count: 69},
{created_on: datetime(2019, 1, 16, 0, 0, 0, 0), id_count: 75},
{created_on: datetime(2019, 1, 17, 0, 0, 0, 0), id_count: 73},
{created_on: datetime(2019, 1, 18, 0, 0, 0, 0), id_count: 77},
{created_on: datetime(2019, 1, 19, 0, 0, 0, 0), id_count: 80},
{created_on: datetime(2019, 1, 20, 0, 0, 0, 0), id_count: 76},
{created_on: datetime(2019, 1, 21, 0, 0, 0, 0), id_count: 78},
{created_on: datetime(2019, 1, 22, 0, 0, 0, 0), id_count: 80},
{created_on: datetime(2019, 1, 23, 0, 0, 0, 0), id_count: 77},
{created_on: datetime(2019, 1, 24, 0, 0, 0, 0), id_count: 75},
{created_on: datetime(2019, 1, 25, 0, 0, 0, 0), id_count: 80},
{created_on: datetime(2019, 1, 26, 0, 0, 0, 0), id_count: 83},
{created_on: datetime(2019, 1, 27, 0, 0, 0, 0), id_count: 86},
{created_on: datetime(2019, 1, 28, 0, 0, 0, 0), id_count: 83},
{created_on: datetime(2019, 1, 29, 0, 0, 0, 0), id_count: 88},
{created_on: datetime(2019, 1, 30, 0, 0, 0, 0), id_count: 90},
{created_on: datetime(2019, 1, 31, 0, 0, 0, 0), id_count: 94},
{created_on: datetime(2019, 2, 1, 0, 0, 0, 0), id_count: 93},
{created_on: datetime(2019, 2, 2, 0, 0, 0, 0), id_count: 100},
{created_on: datetime(2019, 2, 3, 0, 0, 0, 0), id_count: 99},
{created_on: datetime(2019, 2, 4, 0, 0, 0, 0), id_count: 105},
{created_on: datetime(2019, 2, 5, 0, 0, 0, 0), id_count: 106},
{created_on: datetime(2019, 2, 6, 0, 0, 0, 0), id_count: 108},
{created_on: datetime(2019, 2, 7, 0, 0, 0, 0), id_count: 105},
{created_on: datetime(2019, 2, 8, 0, 0, 0, 0), id_count: 104},
{created_on: datetime(2019, 2, 9, 0, 0, 0, 0), id_count: 109},
{created_on: datetime(2019, 2, 10, 0, 0, 0, 0), id_count: 108},
{created_on: datetime(2019, 2, 11, 0, 0, 0, 0), id_count: 111},
{created_on: datetime(2019, 2, 12, 0, 0, 0, 0), id_count: 115},
{created_on: datetime(2019, 2, 13, 0, 0, 0, 0), id_count: 112},
{created_on: datetime(2019, 2, 14, 0, 0, 0, 0), id_count: 118},
{created_on: datetime(2019, 2, 15, 0, 0, 0, 0), id_count: 119},
{created_on: datetime(2019, 2, 16, 0, 0, 0, 0), id_count: 117},
{created_on: datetime(2019, 2, 17, 0, 0, 0, 0), id_count: 120},
{created_on: datetime(2019, 2, 18, 0, 0, 0, 0), id_count: 122},
{created_on: datetime(2019, 2, 19, 0, 0, 0, 0), id_count: 124},
{created_on: datetime(2019, 2, 20, 0, 0, 0, 0), id_count: 123},
{created_on: datetime(2019, 2, 21, 0, 0, 0, 0), id_count: 125},
{created_on: datetime(2019, 2, 22, 0, 0, 0, 0), id_count: 25},
{created_on: datetime(2019, 2, 23, 0, 0, 0, 0), id_count: 127},
{created_on: datetime(2019, 2, 24, 0, 0, 0, 0), id_count: 126},
{created_on: datetime(2019, 2, 25, 0, 0, 0, 0), id_count: 129},
{created_on: datetime(2019, 2, 26, 0, 0, 0, 0), id_count: 130},
{created_on: datetime(2019, 2, 27, 0, 0, 0, 0), id_count: 128},
{created_on: datetime(2019, 2, 28, 0, 0, 0, 0), id_count: 131},
{created_on: datetime(2019, 3, 1, 0, 0, 0, 0), id_count: 135},
{created_on: datetime(2019, 3, 2, 0, 0, 0, 0), id_count: 132},
{created_on: datetime(2019, 3, 3, 0, 0, 0, 0), id_count: 136},
{created_on: datetime(2019, 3, 4, 0, 0, 0, 0), id_count: 138},
{created_on: datetime(2019, 3, 5, 0, 0, 0, 0), id_count: 134},
{created_on: datetime(2019, 3, 6, 0, 0, 0, 0), id_count: 137},
{created_on: datetime(2019, 3, 7, 0, 0, 0, 0), id_count: 135},
{created_on: datetime(2019, 3, 8, 0, 0, 0, 0), id_count: 137},
{created_on: datetime(2019, 3, 9, 0, 0, 0, 0), id_count: 135},
{created_on: datetime(2019, 3, 10, 0, 0, 0, 0), id_count: 138},
{created_on: datetime(2019, 3, 11, 0, 0, 0, 0), id_count: 137},
{created_on: datetime(2019, 3, 12, 0, 0, 0, 0), id_count: 139},
{created_on: datetime(2019, 3, 13, 0, 0, 0, 0), id_count: 140},
{created_on: datetime(2019, 3, 14, 0, 0, 0, 0), id_count: 136},
{created_on: datetime(2019, 3, 15, 0, 0, 0, 0), id_count: 142},
{created_on: datetime(2019, 3, 16, 0, 0, 0, 0), id_count: 146},
{created_on: datetime(2019, 3, 17, 0, 0, 0, 0), id_count: 144},
{created_on: datetime(2019, 3, 18, 0, 0, 0, 0), id_count: 146},
{created_on: datetime(2019, 3, 19, 0, 0, 0, 0), id_count: 150},
{created_on: datetime(2019, 3, 20, 0, 0, 0, 0), id_count: 146},
{created_on: datetime(2019, 3, 21, 0, 0, 0, 0), id_count: 146},
{created_on: datetime(2019, 3, 22, 0, 0, 0, 0), id_count: 148},
{created_on: datetime(2019, 3, 23, 0, 0, 0, 0), id_count: 145},
{created_on: datetime(2019, 3, 24, 0, 0, 0, 0), id_count: 147},
{created_on: datetime(2019, 3, 25, 0, 0, 0, 0), id_count: 145}
}
),

/* Query for the count of Open cases, aggregating by the date they were created on. */
local!openByDate: a!dataSubset(
data: {
{created_on: datetime(2019, 1, 1, 0, 0, 0, 0), id_count: 220},
{created_on: datetime(2019, 1, 2, 0, 0, 0, 0), id_count: 220},
{created_on: datetime(2019, 1, 3, 0, 0, 0, 0), id_count: 221},
{created_on: datetime(2019, 1, 4, 0, 0, 0, 0), id_count: 224},
{created_on: datetime(2019, 1, 5, 0, 0, 0, 0), id_count: 225},
{created_on: datetime(2019, 1, 6, 0, 0, 0, 0), id_count: 227},
{created_on: datetime(2019, 1, 7, 0, 0, 0, 0), id_count: 229},
{created_on: datetime(2019, 1, 8, 0, 0, 0, 0), id_count: 233},
{created_on: datetime(2019, 1, 9, 0, 0, 0, 0), id_count: 229},
{created_on: datetime(2019, 1, 10, 0, 0, 0, 0), id_count: 231},
{created_on: datetime(2019, 1, 11, 0, 0, 0, 0), id_count: 229},
{created_on: datetime(2019, 1, 12, 0, 0, 0, 0), id_count: 222},
{created_on: datetime(2019, 1, 13, 0, 0, 0, 0), id_count: 224},
{created_on: datetime(2019, 1, 14, 0, 0, 0, 0), id_count: 222},
{created_on: datetime(2019, 1, 15, 0, 0, 0, 0), id_count: 218},
{created_on: datetime(2019, 1, 16, 0, 0, 0, 0), id_count: 223},
{created_on: datetime(2019, 1, 17, 0, 0, 0, 0), id_count: 220},
{created_on: datetime(2019, 1, 18, 0, 0, 0, 0), id_count: 216},
{created_on: datetime(2019, 1, 19, 0, 0, 0, 0), id_count: 217},
{created_on: datetime(2019, 1, 20, 0, 0, 0, 0), id_count: 215},
{created_on: datetime(2019, 1, 21, 0, 0, 0, 0), id_count: 212},
{created_on: datetime(2019, 1, 22, 0, 0, 0, 0), id_count: 210},
{created_on: datetime(2019, 1, 23, 0, 0, 0, 0), id_count: 215},
{created_on: datetime(2019, 1, 24, 0, 0, 0, 0), id_count: 218},
{created_on: datetime(2019, 1, 25, 0, 0, 0, 0), id_count: 220},
{created_on: datetime(2019, 1, 26, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 1, 27, 0, 0, 0, 0), id_count: 219},
{created_on: datetime(2019, 1, 28, 0, 0, 0, 0), id_count:205},
{created_on: datetime(2019, 1, 29, 0, 0, 0, 0), id_count:229},
{created_on: datetime(2019, 1, 30, 0, 0, 0, 0), id_count:218},
{created_on: datetime(2019, 1, 31, 0, 0, 0, 0), id_count:221},
{created_on: datetime(2019, 2, 1, 0, 0, 0, 0), id_count: 219},
{created_on: datetime(2019, 2, 2, 0, 0, 0, 0), id_count: 218},
{created_on: datetime(2019, 2, 3, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 2, 4, 0, 0, 0, 0), id_count: 216},
{created_on: datetime(2019, 2, 5, 0, 0, 0, 0), id_count: 218},
{created_on: datetime(2019, 2, 6, 0, 0, 0, 0), id_count: 220},
{created_on: datetime(2019, 2, 7, 0, 0, 0, 0), id_count: 219},
{created_on: datetime(2019, 2, 8, 0, 0, 0, 0), id_count: 217},
{created_on: datetime(2019, 2, 9, 0, 0, 0, 0), id_count: 215},
{created_on: datetime(2019, 2, 10, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 2, 11, 0, 0, 0, 0), id_count: 206},
{created_on: datetime(2019, 2, 12, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 2, 13, 0, 0, 0, 0), id_count: 209},
{created_on: datetime(2019, 2, 14, 0, 0, 0, 0), id_count: 210},
{created_on: datetime(2019, 2, 15, 0, 0, 0, 0), id_count: 207},
{created_on: datetime(2019, 2, 16, 0, 0, 0, 0), id_count: 205},
{created_on: datetime(2019, 2, 17, 0, 0, 0, 0), id_count: 216},
{created_on: datetime(2019, 2, 18, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 2, 19, 0, 0, 0, 0), id_count: 214},
{created_on: datetime(2019, 2, 20, 0, 0, 0, 0), id_count: 210},
{created_on: datetime(2019, 2, 21, 0, 0, 0, 0), id_count: 211},
{created_on: datetime(2019, 2, 22, 0, 0, 0, 0), id_count: 320},
{created_on: datetime(2019, 2, 23, 0, 0, 0, 0), id_count: 209},
{created_on: datetime(2019, 2, 24, 0, 0, 0, 0), id_count: 204},
{created_on: datetime(2019, 2, 25, 0, 0, 0, 0), id_count: 206},
{created_on: datetime(2019, 2, 26, 0, 0, 0, 0), id_count: 208},
{created_on: datetime(2019, 2, 27, 0, 0, 0, 0), id_count: 205},
{created_on: datetime(2019, 2, 28, 0, 0, 0, 0), id_count: 207},
{created_on: datetime(2019, 3, 1, 0, 0, 0, 0), id_count: 205},
{created_on: datetime(2019, 3, 2, 0, 0, 0, 0), id_count: 201},
{created_on: datetime(2019, 3, 3, 0, 0, 0, 0), id_count: 200},
{created_on: datetime(2019, 3, 4, 0, 0, 0, 0), id_count: 192},
{created_on: datetime(2019, 3, 5, 0, 0, 0, 0), id_count: 190},
{created_on: datetime(2019, 3, 6, 0, 0, 0, 0), id_count: 184},
{created_on: datetime(2019, 3, 7, 0, 0, 0, 0), id_count: 186},
{created_on: datetime(2019, 3, 8, 0, 0, 0, 0), id_count: 188},
{created_on: datetime(2019, 3, 9, 0, 0, 0, 0), id_count: 185},
{created_on: datetime(2019, 3, 10, 0, 0, 0, 0), id_count: 183},
{created_on: datetime(2019, 3, 11, 0, 0, 0, 0), id_count: 178},
{created_on: datetime(2019, 3, 12, 0, 0, 0, 0), id_count: 181},
{created_on: datetime(2019, 3, 13, 0, 0, 0, 0), id_count: 180},
{created_on: datetime(2019, 3, 14, 0, 0, 0, 0), id_count: 184},
{created_on: datetime(2019, 3, 15, 0, 0, 0, 0), id_count: 178},
{created_on: datetime(2019, 3, 16, 0, 0, 0, 0), id_count: 180},
{created_on: datetime(2019, 3, 17, 0, 0, 0, 0), id_count: 177},
{created_on: datetime(2019, 3, 18, 0, 0, 0, 0), id_count: 175},
{created_on: datetime(2019, 3, 19, 0, 0, 0, 0), id_count: 173},
{created_on: datetime(2019, 3, 20, 0, 0, 0, 0), id_count: 175},
{created_on: datetime(2019, 3, 21, 0, 0, 0, 0), id_count: 178},
{created_on: datetime(2019, 3, 22, 0, 0, 0, 0), id_count: 170},
{created_on: datetime(2019, 3, 23, 0, 0, 0, 0), id_count: 172},
{created_on: datetime(2019, 3, 24, 0, 0, 0, 0), id_count: 175},
{created_on: datetime(2019, 3, 25, 0, 0, 0, 0), id_count: 176}
}
),
{
a!lineChartField(
label: "Open vs. Closed Cases",
yAxisTitle: "# of Cases",
categories: index(local!resolvedByDate.data, "created_on"),
series: {
a!chartSeries(
label: "Closed",
data: index(local!resolvedByDate.data, "id_count"),
color: "GREEN"
),
a!chartSeries(
label: "Open",
data: index(local!openByDate.data, "id_count"),
color: "RED"
)
}
)
}
)

Displays the following: gif which zooms in on a section of data in the line chart

Multiple series line chart with label, x-axis title, y-axis title, and legend

a!lineChartField(
  label: "Tempo Usage Trends",
  categories: {"Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan", "Feb"},
  series: {
    a!chartSeries(label: "IT", data: {92, 94, 93, 95, 96, 99, 98, 100, 99, 91, 98, 99}),
    a!chartSeries(label: "Human Services", data: {84, 83, 85, 86, 87, 89, 91, 90, 89, 83, 93, 95}),
    a!chartSeries(label: "Sales", data: {70, 63, 90, 72, 74, 74, 76, 89, 72, 65, 100, 85}),
    a!chartSeries(label: "Marketing", data: {80, 80, 80, 90, 90, 90, 90, 90, 90, 70, 90, 90})
  },
  colorScheme: "PARACHUTE",
  xAxisTitle: "Month",
  yAxisTitle: "% Active",
  yAxisMax: 100,
  showLegend: true
)

Displays the following:

screenshot of a line chart with chart label, axes titles, and legend

Multiple series line chart with tooltips and a null data point

a!lineChartField(
  categories: {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"},
  series: {
    a!chartSeries(label: "High", data: {76, 82, null, 92, 87, 79, 80}),
    a!chartSeries(label: "Low", data: {64, 70, 82, 81, 75, 67, null})
  },
  colorScheme: a!colorSchemeCustom(
    colors: {
      "#3c78d8",
      "#6aa84f"
    }
  ),
  xAxisTitle: "Day",
  yAxisTitle: "Temperature (F)",
  showLegend: true
)

Displays the following:

screenshot of a line chart with two lines, one with null data points

Connect null data points in a line chart

a!localVariables(
  local!agent: {
    "Hi! Thanks for calling today! How may I help you?",
    null,
    "I can help! First, please verify your data of birth.",
    null,
    "Ok, thank you. Now I'll look up your order.",
    null,
    "Thanks for your patience.I've found it.",
    null,
    "Oh no! Which item is it?",
    null,
    "I'm sorry about that. We'll send you another one free of charge.",
    null,
    "Is there anything else I can help with?",
    null
  },
  local!customer: {
    null,
    "I have a problem with my order",
    null,
    "My birth date is January 1st, 1970.",
    null,
    "This is so slow. What's the problem?",
    null,
    "An item is damaged. I'm so annoyed.",
    null,
    "The prongs are bent on the charging cable. It's useless.",
    null,
    "OK. Thank you for fixing it.",
    null,
    "That's it. Thanks for your help."
  },
  {
    a!lineChartField(
      label: "Conversation Sentiment Analysis",
      labelPosition: "ABOVE",
      categories: a!forEach(
        items: local!agent,
        expression: if(
          isNull(
            fv!item
          ),
          local!customer[fv!index],
          fv!item
        )
      ),
      series: {
        a!chartSeries(
          label: "Agent",
          data: a!forEach(
            items: local!agent,
            expression: if(
              isNull(
                fv!item
              ),
              null,
              a!sentimentScore(
                {
                  fv!item
                }
              )
            )
          )
        ),
        a!chartSeries(
          label: "Customer",
          data: a!forEach(
            items: local!customer,
            expression: if(
              isNull(
                fv!item
              ),
              null,
              a!sentimentScore(
                {
                  fv!item
                }
              )
            )
          )
        )
      },
      colorScheme: a!colorSchemeCustom(
        colors: {
          "#FFC300",
          "#800080"
        }
      ),
      referenceLines: {
        a!chartReferenceLine(
          label: "Positive",
          value: 0.5,
          color: "#008000"
        ),
        a!chartReferenceLine(
          label: "Negative",
          value: - 0.5,
          color: "#FF0000"
        )
      },
      showLegend: true,
      showTooltips: true,
      connectNulls: true
    )
  }
)

Displays the following:

screenshot of a line chart that connects null data points

Feature compatibility

The table below lists this component's compatibility with various features in Appian.

Feature	Compatibility	Note
Portals	Compatible
Offline Mobile	Incompatible
Sync-Time Custom Record Fields	Incompatible
Real-Time Custom Record Fields	Incompatible	Custom record fields that evaluate in real time must be configured using one or more Custom Field functions.
Process Reports	Incompatible	Cannot be used to configure a process report.
Process Events	Incompatible	Cannot be used to configure a process event node, such as a start event or timer event.

Old versions

There are older versions of this interface component. You can identify older versions by looking at the name to see if there is a version suffix. If you are using an old version, be sure to refer to the corresponding documentation from the list below.

Old Versions	Reason for Update
a!lineChartField_19r1	Added ability to display thousands of data points without scrolling. When the chart shows date or date and time fields, the x-axis labels are formatted to match the end user's time zone and resized to avoid clutter.

To learn more about how Appian handles this kind of versioning, see the Function and Component Versions page.

The following patterns include usage of the Line Chart Component.

Dynamically Show Sales by Product Category Compared to Total Sales (Records, Reports, Charts, Filtering): This pattern illustrates how to create an area chart that dynamically displays sales generated by product category compared to total sales.
Trend-Over-Time Report (Charts, Reports): This report provides an attractive, interactive design for exploring different series of data over time.
Use a Filter to Adjust Chart Reference Lines (Filtering, Charts): Using a dropdown, filter the results of a data set while also adjusting a chart reference line.

Line Chart Component

Charts

Function

Parameters

Configuration

Using record data

Using categories and series

Categories

Series

Usage considerations

Chart data

Chart line and background color

Chart refresh behavior

Examples

Single series line chart with label and instructions

Display date and time fields in a line chart

Multiple series line chart with label, x-axis title, y-axis title, and legend

Multiple series line chart with tooltips and a null data point

Connect null data points in a line chart

Feature compatibility

Old versions

Related Patterns