safe_log: Take logarithm avoiding underflow
In nathanlazar/BaTFLED3D: Bayesian Tensor Factorization Linked to External Data

Returns the normal log if there is no underflow. If there is underflow, then returns the minimum for which log can return (-744.4401)

1	safe_log(x)

x

vector

vector log in base e of input or minimum possible log value of -744.4401

1 2	log(c(1e-323, 1e-324)) # gives -Inf for the second value safe_log(c(1e-323, 1e-324)) # gives the minimum value of -744.4401

nathanlazar/BaTFLED3D documentation built on May 23, 2019, 12:19 p.m.

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