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fdiv

Input Stack:
ts2: TimeSeriesExpr
ts1: TimeSeriesExpr
 ⇨ Output Stack:
(ts1 / ts2): TimeSeriesExpr
 

Floating point division operator that follows strict IEEE 754 floating point arithmetic. Compute a new time series where each interval has the value (ts1 / ts2) where values are the corresponding intervals in the input time series.

Parameters

  • ts1: First time series expression (left operand, numerator)
  • ts2: Second time series expression (right operand, denominator)

Floating Point Behavior

This operator follows strict floating point rules, including:

:fdiv 2.0 NaN Inf NaN NaN
Input 1 2.0 0.0 1.0 1.0 NaN
Input 2 1.0 0.0 0.0 NaN NaN

Key behaviors: * Division by zero: Results in positive or negative infinity (Inf) * Zero divided by zero: Results in NaN * Any operation with NaN: Results in NaN

Warning

For time series visualization: The strict floating point behavior can create confusing results when dealing with missing data or inactive periods. Unless you specifically need IEEE 754 compliance, use :div instead, which provides behavior more appropriate for time series graphs.

Examples

Dividing by a constant value:

BeforeAfter
name,sps,:eq

name,sps,:eq,
1024,:fdiv

Dividing two time series:

BeforeAfter
name,requestLatency,:eq,
:sum,
name,requestsPerSecond,:eq,
:max,
(,name,),:by

name,requestLatency,:eq,
:sum,
name,requestsPerSecond,:eq,
:max,
(,name,),:by,
:fdiv
  • :div - Division with special zero handling (often preferred for time series)
  • :fadd - Floating point addition
  • :fsub - Floating point subtraction
  • :fmul - Floating point multiplication