3 ms·

> used it in anger quite successfully Care to elaborate?

riazrizvi 3y ago
Possibly used to dash bugs into oblivion, or held up at arms length at a protest rally to condemn book banning? My guesses in case OP doesn't come back. I'm sure if we all make enough guesses, then take the average, we'll come up with the correct answer.
- aktenlage 3y ago
  Do not forget to weight the guesses by their uncertainty, considering the correlation between the guesses.
- tonyarkles 3y ago
  The sibling posts figured it out. I have gone from picking up this book to using the material in it in production, using the contents of the book as my primary reference to get from a vague understanding to an implementation I don't think much about because it Just Works.
mlsu 3y ago
It's a British-ism for "used in actual practice, rather than academically/theoretically" https://dictionary.cambridge.org/dictionary/english/in-anger https://dictionary.cambridge.org/dictionary/english/in-anger
- crazygringo 3y ago
  Ah thank you -- as an American I've never come across that expression my whole life!
  - btilly 3y ago
    I wasn't aware of this as a British/American thing. As a programmer, it is just a phrase that I picked up because other programmers used it and I liked it. And yes. I'm an American.
    - tonyarkles 3y ago
      Yeah I'm pretty sure I picked it up on HN :) Am Canadian.
- deleted 3y ago
  [deleted]
variaga 3y ago
Thec phrase "used Y in anger" means "used seriously" or "used for its intended purpose". The origin phrase/trope-namer is "never fired its guns in anger" applied to a naval warship in peacetime to describe the case where it might have fired its guns in practice, but not in combat. Entering "never fired its guns in anger" in your favorite search engine should give several examples. Here's one in an article from last week. https://owlcation.com/humanities/What-If-The-USS-Arizona-Never-Sank https://owlcation.com/humanities/What-If-The-USS-Arizona-Nev... - "The USS Arizona never fired her guns in anger."
tonyarkles 3y ago
Hah, yes, I see everyone else has filled you in already. I have several Kalman Filters modelling both linear (conventional KF) and non-linear (Extended) systems in production that were derived primarily from the material in this book. I did have to do some application-specific research for a couple of things, for example 3D attitude estimation is a deep dark hole with many different formulations with different pros and cons, but the book gave me a very solid foundation for being able to take attitude estimation papers from NASA and others and work through the approach I wanted to use.

Possibly used to dash bugs into oblivion, or held up at arms length at a protest rally to condemn book banning? My guesses in case OP doesn't come back. I'm sure if we all make enough guesses, then take the average, we'll come up with the correct answer.

aktenlage 3y ago
Do not forget to weight the guesses by their uncertainty, considering the correlation between the guesses.
tonyarkles 3y ago
The sibling posts figured it out. I have gone from picking up this book to using the material in it in production, using the contents of the book as my primary reference to get from a vague understanding to an implementation I don't think much about because it Just Works.

mlsu 3y ago

It's a British-ism for "used in actual practice, rather than academically/theoretically" https://dictionary.cambridge.org/dictionary/english/in-anger https://dictionary.cambridge.org/dictionary/english/in-anger

crazygringo 3y ago
Ah thank you -- as an American I've never come across that expression my whole life!
- btilly 3y ago
  I wasn't aware of this as a British/American thing. As a programmer, it is just a phrase that I picked up because other programmers used it and I liked it. And yes. I'm an American.
  - tonyarkles 3y ago
    Yeah I'm pretty sure I picked it up on HN :) Am Canadian.
deleted 3y ago
[deleted]

variaga 3y ago

Thec phrase "used Y in anger" means "used seriously" or "used for its intended purpose". The origin phrase/trope-namer is "never fired its guns in anger" applied to a naval warship in peacetime to describe the case where it might have fired its guns in practice, but not in combat. Entering "never fired its guns in anger" in your favorite search engine should give several examples. Here's one in an article from last week. https://owlcation.com/humanities/What-If-The-USS-Arizona-Never-Sank https://owlcation.com/humanities/What-If-The-USS-Arizona-Nev... - "The USS Arizona never fired her guns in anger."

tonyarkles 3y ago

Hah, yes, I see everyone else has filled you in already. I have several Kalman Filters modelling both linear (conventional KF) and non-linear (Extended) systems in production that were derived primarily from the material in this book. I did have to do some application-specific research for a couple of things, for example 3D attitude estimation is a deep dark hole with many different formulations with different pros and cons, but the book gave me a very solid foundation for being able to take attitude estimation papers from NASA and others and work through the approach I wanted to use.