ECLNoiseData Class Reference

Container for constant matrix used to generate electronic noise. More...

#include <ECLWaveformData.h>

Inheritance diagram for ECLNoiseData:

Collaboration diagram for ECLNoiseData:

Public Member Functions
void	setMatrixElement (size_t i, float value)
	Setter method for independent matrix element.
float	getMatrixElement (size_t i) const
	Getter method for independent matrix element.
void	getArray (float NoiseData[496]) const
	Getter method for matrix as one dimentional array.
void	getMatrix (float M[31][31]) const
	Getter method for matrix as two dimentional array.
void	generateCorrelatedNoise (const float z[31], float x[31]) const
	sampling a random vector x from the 31-dimensional multivariate normal distribution with covariance matrix C

Public Attributes
Float_t	m_matrixElement [c_nElements]
	electronic noise matrix

Static Public Attributes
static const size_t	c_nElements = 496
	number of independent elements

Detailed Description

Container for constant matrix used to generate electronic noise.

Definition at line 174 of file ECLWaveformData.h.

Member Function Documentation

generateCorrelatedNoise()

void generateCorrelatedNoise ( const float  z[31], float  x[31]  ) const

inline

sampling a random vector x from the 31-dimensional multivariate normal distribution with covariance matrix C

Definition at line 208 of file ECLWaveformData.h.

    {
      // z = (z0, ..., z30) is a inpute vector whose components are 31 independent standard normal variates
      // the output vector x is x0 + A*z, where x0 is 0 at the moment
      // A*A^T = C where C is a positive definite covariance matrix, A is a lower triangular matrix
      const float* A = m_matrixElement;
      for (int i = 0; i < 31; i++) {
        float sum = 0;
        for (int j = 0; j <= i; j++) sum += z[j] * (*A++);
        x[i] = sum;
      }
    }

getArray()

void getArray ( float  NoiseData[496] ) const

inline

Getter method for matrix as one dimentional array.

Definition at line 190 of file ECLWaveformData.h.

{for (int i = 0; i < 496; i++) { NoiseData[i] = (float) m_matrixElement[i];}   }

getMatrix()

void getMatrix ( float  M[31][31] ) const

inline

Getter method for matrix as two dimentional array.

Definition at line 193 of file ECLWaveformData.h.

    {
      const float* A = m_matrixElement;
      for (int i = 0; i < 31; i++) {
        for (int j = 0; j < 31; j++) {
          if (j > i) { // fill only the lower triangle
            M[i][j] = 0.f;
          } else {
            M[i][j] = *A++;
          }
        }
      }
    }

getMatrixElement()

float getMatrixElement ( size_t  i ) const

inline

Getter method for independent matrix element.

Definition at line 183 of file ECLWaveformData.h.

    {
      assert(i < c_nElements);
      return m_matrixElement[i];
    }

setMatrixElement()

void setMatrixElement ( size_t  i, float  value  )

inline

Setter method for independent matrix element.

Definition at line 177 of file ECLWaveformData.h.

    {
      assert(i < c_nElements);
      m_matrixElement[i] = value;
    }

Member Data Documentation

c_nElements

const size_t c_nElements = 496

static

number of independent elements

Definition at line 221 of file ECLWaveformData.h.

m_matrixElement

Float_t m_matrixElement[c_nElements]

electronic noise matrix

Definition at line 223 of file ECLWaveformData.h.

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

• ecl/dbobjects/include/ECLWaveformData.h