precalculus does matter
Feb. 23rd, 2005 05:01 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
trocheeI just spent three days working out why two different language modeling schemes were producing vastly different log-probabilities. I was using every bit of good software design practice that I know, and leaning on colleagues to confirm that I was running it right.
You know why it all went wrong? System X produces probabilities in logarithms of base 10, and system Y does it in base e.
This reminds me of the stories about the Mars Climate Orbiter unit conversion error, although that is apparently apocryphal.
You know why it all went wrong? System X produces probabilities in logarithms of base 10, and system Y does it in base e.
This reminds me of the stories about the Mars Climate Orbiter unit conversion error, although that is apparently apocryphal.
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no subject
Date: 2005-02-25 08:01 am (UTC)[{refrain}fish heads fish heads, roly poly fish heads, fish heads fish heads, eat them up, YUM! {verse}you can take a fish head / to a movie / wouldn't have to pay to / get - it - in!}]