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 HYPHY Reference:Constant:COVARIANCE_PRECISION

COVARIANCE_PRECISION Constant
  A constant which determines what method is used by CovarianceMatrix in computing the numerical Hessian.
Syntax  COVARIANCE_PRECISION = 1 or 2;
Notes 1 - use a first order difference formula for partial derivatives (one function evaluation per cell) (Default)
2 - use a second order difference formula for partial derivatives (4 function evaluations per cell)
Examples
 Last modified: 8/20/2002

 
Sergei L. Kosakovsky Pond and Spencer V. Muse, 1997-2002