Rate

Return the difference over time between the current value and a previously evaluated value of an attribute or (time) expression.

Syntax

Rate(x)

Arguments

• x

  An attribute or (time) expression that resolves to a numeric value

Returns

• The calculated difference, using the value of the attribute, numeric, or timestamp value of the expression parameter, according to this formula: (current value – previously evaluated value) / (current timestamp – timestamp from previous evaluation)

Example

• Rate(‘att1’)

• Rate('sinusoid')

• Rate(DaySec(‘*’) + 1)