NoisyChannel Class Reference

Check if any channels are noisy compared to neighboring ones. More...

#include <QTest.h>

Inheritance diagram for NoisyChannel:

Public Member Functions
	NoisyChannel (const std::string &name)
float	runTest (const MonitorElement *me)
void	setNumNeighbors (unsigned n)
void	setTolerance (float percentage)
Public Member Functions inherited from SimpleTest
virtual std::vector< DQMChannel >	getBadChannels (void) const
	get vector of channels that failed test (not always relevant!) More...
void	setMinimumEntries (unsigned n)
	set minimum # of entries needed More...
	SimpleTest (const std::string &name, bool keepBadChannels=false)
Public Member Functions inherited from QCriterion
std::string	algoName (void) const
	get algorithm name More...
std::string	getMessage (void) const
	get message attached to test More...
std::string	getName (void) const
	get name of quality test More...
int	getStatus (void) const
	(class should be created by DQMStore class) More...
void	setErrorProb (float prob)
void	setWarningProb (float prob)
	set probability limit for warning and error (default: 90% and 50%) More...

Static Public Member Functions
static std::string	getAlgoName (void)

Protected Member Functions
double	getAverage (int bin, const TH1 *h) const
Protected Member Functions inherited from SimpleTest
virtual void	setMessage (void)
	set status & message after test has run More...
Protected Member Functions inherited from QCriterion
void	init (void)
	initialize values More...
	QCriterion (std::string qtname)
float	runTest (const MonitorElement *me, QReport &qr, DQMNet::QValue &qv)
void	setAlgoName (std::string name)
	set algorithm name More...
void	setVerbose (int verbose)
	probability limits for warnings, errors More...
virtual	~QCriterion (void)

Protected Attributes
unsigned	numNeighbors_
bool	rangeInitialized_
float	tolerance_
Protected Attributes inherited from SimpleTest
std::vector< DQMChannel >	badChannels_
bool	keepBadChannels_
unsigned	minEntries_
Protected Attributes inherited from QCriterion
std::string	algoName_
	name of quality test More...
float	errorProb_
std::string	message_
	quality test status More...
float	prob_
	name of algorithm More...
std::string	qtname_
int	status_
int	verbose_
float	warningProb_
	message attached to test More...

Detailed Description

Check if any channels are noisy compared to neighboring ones.

Definition at line 301 of file QTest.h.

Constructor & Destructor Documentation

NoisyChannel::NoisyChannel ( const std::string &  name )

inline

Definition at line 304 of file QTest.h.

References getAlgoName(), numNeighbors_, rangeInitialized_, and QCriterion::setAlgoName().

                                      : SimpleTest(name,true)
  {
    rangeInitialized_ = false;
    numNeighbors_ = 1;
    setAlgoName(getAlgoName());
  }

Member Function Documentation

static std::string NoisyChannel::getAlgoName ( void  )

inlinestatic

Definition at line 310 of file QTest.h.

Referenced by QTestConfigure::EnableNoisyChannelTest(), QTestConfigure::enableTests(), NoisyChannel(), and QTestParameterNames::QTestParameterNames().

{ return "NoisyChannel"; }

double NoisyChannel::getAverage ( int  bin, const TH1 *  h  ) const

protected

get average for bin under consideration (see description of method setNumNeighbors)

do NOT use underflow bin

do NOT use overflow bin

use symmetric-to-bin bins to calculate average

check if need to consider bins on other side of spectrum (ie. if bins below 1 or above ncx)

average is sum over the # of bins used

Definition at line 843 of file QTest.cc.

References first, and i.

{
  int first = 1;
  int ncx  = h->GetXaxis()->GetNbins();
  double sum = 0; int bin_low, bin_hi;
  for (unsigned i = 1; i <= numNeighbors_; ++i)
  {
    bin_low = bin-i;  bin_hi = bin+i;
    while (bin_low < first) // shift bin by +ncx
      bin_low = ncx + bin_low;
    while (bin_hi > ncx) // shift bin by -ncx
      bin_hi = bin_hi - ncx;
      sum += h->GetBinContent(bin_low) + h->GetBinContent(bin_hi);
  }
  return sum/(numNeighbors_ * 2);
}

float NoisyChannel::runTest ( const MonitorElement *  me )

virtual

Reimplemented from QCriterion.

Definition at line 747 of file QTest.cc.

References PDRates::average, newFWLiteAna::bin, gather_cfg::cout, MonitorElement::DQM_KIND_TH1D, MonitorElement::DQM_KIND_TH1F, MonitorElement::DQM_KIND_TH1S, MonitorElement::DQM_KIND_TH2D, MonitorElement::DQM_KIND_TH2F, MonitorElement::DQM_KIND_TH2S, cmsPerfPublish::fail(), first, MonitorElement::getFullname(), MonitorElement::getRootObject(), MonitorElement::getTH1D(), MonitorElement::getTH1F(), MonitorElement::getTH1S(), MonitorElement::getTH2D(), MonitorElement::getTH2F(), MonitorElement::getTH2S(), h, MonitorElement::kind(), prof2calltree::last, and ExpressReco_HICollisions_FallBack::nbins.

{
  badChannels_.clear();
  if (!me) 
    return -1;
  if (!me->getRootObject()) 
    return -1; 
  TH1* h=0;//initialize histogram pointer

  if (verbose_>1) 
    std::cout << "QTest:" << getAlgoName() << "::runTest called on " 
              << me-> getFullname() << "\n";

  int nbins=0;
  //-- TH1F
  if (me->kind()==MonitorElement::DQM_KIND_TH1F)
  { 
    nbins = me->getTH1F()->GetXaxis()->GetNbins(); 
    h  = me->getTH1F(); // access Test histo
  } 
  //-- TH1S
  else if (me->kind()==MonitorElement::DQM_KIND_TH1S)
  { 
    nbins = me->getTH1S()->GetXaxis()->GetNbins(); 
    h  = me->getTH1S(); // access Test histo
  } 
  //-- TH1D
  else if (me->kind()==MonitorElement::DQM_KIND_TH1D)
  { 
    nbins = me->getTH1D()->GetXaxis()->GetNbins(); 
    h  = me->getTH1D(); // access Test histo
  } 
  //-- TH2
  else if (me->kind()==MonitorElement::DQM_KIND_TH2F)
  { 
    nbins = me->getTH2F()->GetXaxis()->GetNbins() *
            me->getTH2F()->GetYaxis()->GetNbins();
    h  = me->getTH2F(); // access Test histo
  } 
  //-- TH2
  else if (me->kind()==MonitorElement::DQM_KIND_TH2S)
  { 
    nbins = me->getTH2S()->GetXaxis()->GetNbins() *
            me->getTH2S()->GetYaxis()->GetNbins();
    h  = me->getTH2S(); // access Test histo
  } 
  //-- TH2
  else if (me->kind()==MonitorElement::DQM_KIND_TH2D)
  { 
    nbins = me->getTH2D()->GetXaxis()->GetNbins() *
            me->getTH2D()->GetYaxis()->GetNbins();
    h  = me->getTH2D(); // access Test histo
  } 
  else 
  {  
    if (verbose_>0) 
      std::cout << "QTest:NoisyChannel"
        << " ME " << me->getFullname() 
        << " does not contain TH1F/TH1S/TH1D or TH2F/TH2S/TH2D, exiting\n"; 
    return -1;
  }

  //--  QUALITY TEST itself 

  if ( !rangeInitialized_ || !h->GetXaxis() ) 
    return 1; // all channels are accepted if tolerance has not been set

  // do NOT use underflow bin
  int first = 1;
  // do NOT use overflow bin
  int last  = nbins;
  // bins outside Y-range
  int fail = 0;
  int bin;
  for (bin = first; bin <= last; ++bin)
  {
    double contents = h->GetBinContent(bin);
    double average = getAverage(bin, h);
    bool failure = false;
    if (average != 0)
       failure = (((contents-average)/TMath::Abs(average)) > tolerance_);

    if (failure)
    {
      ++fail;
      DQMChannel chan(bin, 0, 0, contents, h->GetBinError(bin));
      badChannels_.push_back(chan);
    }
  }

  // return fraction of bins that passed test
  return 1.*(nbins - fail)/nbins;
}

void NoisyChannel::setNumNeighbors ( unsigned  n )

inline

set # of neighboring channels for calculating average to be used for comparison with channel under consideration; use 1 for considering bin+1 and bin-1 (default), use 2 for considering bin+1,bin-1, bin+2,bin-2, etc; Will use rollover when bin+i or bin-i is beyond histogram limits (e.g. for histogram with N bins, bin N+1 corresponds to bin 1, and bin -1 corresponds to bin N)

Definition at line 320 of file QTest.h.

References n, and numNeighbors_.

Referenced by QTestConfigure::EnableNoisyChannelTest().

{ if (n > 0) numNeighbors_ = n; }

void NoisyChannel::setTolerance ( float  percentage )

inline

set (percentage) tolerance for considering a channel noisy; eg. if tolerance = 20%, a channel will be noisy if (contents-average)/|average| > 20%; average is calculated from neighboring channels (also see method setNumNeighbors)

Definition at line 326 of file QTest.h.

References rangeInitialized_, and tolerance_.

Referenced by QTestConfigure::EnableNoisyChannelTest().

  {
    if (percentage >=0)
    {
      tolerance_ = percentage;
      rangeInitialized_ = true;
    }
  }

Member Data Documentation

unsigned NoisyChannel::numNeighbors_

protected

Definition at line 341 of file QTest.h.

Referenced by NoisyChannel(), and setNumNeighbors().

bool NoisyChannel::rangeInitialized_

protected

Definition at line 343 of file QTest.h.

Referenced by NoisyChannel(), and setTolerance().

float NoisyChannel::tolerance_

protected

Definition at line 340 of file QTest.h.

Referenced by setTolerance().