double logGammaSum

(double* log_a, state* s, hypoList* parent)

Calculates the logarithm of sum(exp(log_a[j,a_pos])+exp(log_gamma[j,g_pos])) which corresponds to the logarithm of the sum of a[j,a_pos]*gamma[j,g_pos]

Documentation

Calculates the logarithm of sum(exp(log_a[j,a_pos])+exp(log_gamma[j,g_pos])) which corresponds to the logarithm of the sum of a[j,a_pos]*gamma[j,g_pos]

Parameters:

log_a - : transition matrix with logarithmic values (1.0 for log(0))
s - : state whose gamma-value is calculated
parent - : a pointer to the parent hypothesis

Returns:

logSum for products of a row from gamma and a row from matrix A

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