ProbeJitter Class Reference
[Probes]

Measures the jitter of the observed values. More...

#include <probejitter.h>

Inherits Probe.

Inheritance diagram for ProbeJitter:

[legend]Collaboration diagram for ProbeJitter:


Public Member Functions
virtual void	Reset (void)
	[internal] Reset the probe, clearing all its internal counters and starting a new output file.
virtual void	Zap (double)
	[internal] Reset the probe, clearing all its internal counters. The meaning of the parameter is probe-dependant.
virtual void	Observe (double value)
	Observe a value, actual use of the value is probe-dependant.
virtual void	WriteToFile (double time)
	[internal] Write the probe statistics to the output file. It is called periodically by NePSing.

Detailed Description

Measures the jitter of the observed values.

Defined $y_i = x_i - x_{i-1}$ , where $x_i$ is the current observed value and $x_{i-1}$ is the last observed value, this probe measures the long-term $StDev\{y\}$ , $\overline{y} = E[y]$ , $\overline{y^2} = E^2[y^2]$ and $\sigma^2 = E[(y-\overline{y})^2]$

output file format:

[Time of the observation] TAB $StDev\{y\}$ TAB $\overline{y}$ TAB $\overline{y^2}$ TAB $\sigma^2$

Note that this probe cannot be global, as it have a memory and it could not work in a global fashon. In case you need a global jitter measure, use a global ProbeMean with a per-intance memory.

The documentation for this class was generated from the following file:

probejitter.h

Generated on Wed Dec 22 23:23:49 2004 for NePSing by

1.3.9.1 ---- Hosted by

ProbeJitter Class Reference [Probes]

Public Member Functions

Detailed Description

ProbeJitter Class Reference
[Probes]