PFChrom v5 Documentation Contents            AIST Software Home            AIST Software Support

ZDD - [Q] Error Model (Symmetric)

This is the Zero Distortion Density (ZDD) used in the GenHVL[Q] models. This generalized normal's a1 center parameter is the mean of the underlying Normal. The a3 parameter in the ZDD nomenclature adjusts the fourth moment or kurtosis of the peak. This ZDD has no asymmetry or skew adjustment.

This is also the ZDD used in the GenNLC[Q] models. For the GenNLC[Q] models, a0, a1, and a3 will be identical. The a2 width or second moment term will reflect a kinetic time constant. Please see the GenHVL and GenNLC equivalence topic for further details.



ZDD - [Q]5.png

a0 = Area

a1 = Center

a2 = Width

a3= Error model power (.25 > a3 > 4 , Laplace=1, Gaussian=2)


Built-In Peak Model

  NError (Statistical family)

User-Defined Peaks and View Functions

  NError(x,area,center,width,shape) Error Area shape 2=Gaussian 1=DblExp
  NError_C(x,amplitude,center,width,n-power) Sym Gen. Normal cumulative
  NError_CR(x,amplitude,center,width,n-power) Sym Gen. Normal reverse cumulative

c:\1pf\v5 help\home.gif ZDD - [Y] ZDD - [YpE]