HUGE_VAL does not help here, we need kind of a TINY_VAL. 1 / HUGE_VAL does not work: 

$ perl -MPOSIX=HUGE_VAL -e 'print log(1 / HUGE_VAL)'
Can't take log of 0 at -e line 1.

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In reply to Re^3: Calculate log of matrix values by choroba
in thread Calculate log of matrix values by madM

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