Metric - AWS IoT SiteWise

Metric

Contains an asset metric property. With metrics, you can calculate aggregate functions, such as an average, maximum, or minimum, as specified through an expression. A metric maps several values to a single value (such as a sum).

The maximum number of dependent/cascading variables used in any one metric calculation is 10. Therefore, a root metric can have up to 10 cascading metrics in its computational dependency tree. Additionally, a metric can only have a data type of DOUBLE and consume properties with data types of INTEGER or DOUBLE.

For more information, see Metrics in the AWS IoT SiteWise User Guide.

Contents

expression

The mathematical expression that defines the metric aggregation function. You can specify up to 10 variables per expression. You can specify up to 10 functions per expression.

For more information, see Quotas in the AWS IoT SiteWise User Guide.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1024.

Required: Yes

variables

The list of variables used in the expression.

Type: Array of ExpressionVariable objects

Required: Yes

window

The window (time interval) over which AWS IoT SiteWise computes the metric's aggregation expression. AWS IoT SiteWise computes one data point per window.

Type: MetricWindow object

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: