The Nineteenth Byte

7:00 PM

@AndréMuta That's only true if your line is a perfect fit to the data. You minimize the errors but they're only nonzero if there's no error.

André Muta

in such way that in the end the sum of errors is always 0.

Yeah, but their sum is zero.

They are not zero but the sum is.

flawr

@AndréMuta Assume not all residuals are zero. Then the squares of those are all positive. Which results in a quite positive sum?

André Muta

Oh, i was thinking about the errors not squared errors

You are right.

Alex A.

If the sum of squared errors is 0, you have no variance, which implies a perfect fit of the line to the data, which is rarely the case.

@AndréMuta I'm always right. >:D

André Muta

Hahaha

Thanks

flawr

7:03 PM

@AlexA. As soon as you mention variance it sounds way to mathy.

El'endia Starman

@AlexA. .....not sure if actually biased, or confirmation bias...

Geobits

><

flawr

MR (sm)ALL CAPS IS HERE.

Geobits

That wheel is to blame for my umm, constant mental anguish and uh, associated loss of revenue and so and so forth. You'll be hearing from my lawyers.

André Muta

The sum of the squared errors is the coefficient of determination (r^2) right?

flawr

7:06 PM

i do not think so

as r^2 is always between 0 and 1

Except perhaps when you put some complex numbers in your data.

Which admittedly does not make much sense then=)

Dennis

@AlexA. The starboard begs to differ.

3

André Muta

But if I fit the own model

on its data

Ah nevermind

Geobits

20

A: How to Convince Humans to Allow a Machine Take-Over

"How to convince humans to allow a machine take over?" - the answer is, of course, "Gradually." Start with putting one machine into every home, say an AI that is so dumb that it is not really an AI, but just a computational device. Then start adding other similar machines, maybe some that will ...

André Muta

The R2 is the squared of the correlations it seems.

Zgarb

@Geobits I like how the comments have evolved into a debate on whether machines can have souls.

Geobits

7:11 PM

Yea, especially since the obvious answer is yes ;)

Peter Taylor

Are any questions on world-building actually about world building?

6

Geobits

I think there were a few when they were first starting.

feersum

What is actual world building?

Geobits

It's definitely more "rationalize this thing I came up with" from what I see of it.

Alex A.

@AndréMuta The sum of squared errors is (n-1)s^2, i.e. the estimated variance or mean squared error or whatever you'd like to call it, multiplied by the sample size -1.

isaacg

7:17 PM

@Dennis In .uu|*GHhGjNT1Q I'm using .u as a repeat until the value stops changing. This is because I'm using the arity 2 form instead of the arity 3 form. The value in question is an integer. Another common use pattern, not used here, is the apply N times pattern.

Peter Taylor

@feersum Constructing a setting for a story.

Alex A.

@flawr It's just jargon for the mean of the squared distances between the points and the line.

André Muta

@AlexA. I made some changes, feel free to edit anything on my sandbox

flawr

@AlexA. I know, but it still sounds way to mathy for this chat..

Dennis

@isaacg I tried answering that question in Pyth (I had seen you use .u like that before), but I couldn't figure out how. So .u<lambda><integer N><integer> is repeat N times, and .u<lambda><integer> is repeat until fixed point, correct?

Alex A.

7:21 PM

@flawr Says someone studying math and considering a master's in it ;)

flawr

@AlexA. But not with something as dirty as probability or stats???

@AlexA. Way too useful.

Alex A.

Excuse me, dirty? ಠ_ಠ

flawr

@AlexA. And we are still in the nineteenth byte.

@AlexA. Already excused.

Alex A.

No, we lost a byte; we're the 18th Byte now.

flawr

Where did it go?

Alex A.

7:24 PM

Dennis golfed it.

Geobits

He didn't do a very good job. I count 19.

flawr

He should do it in cjam and I bet its about 5 bytes shorter

Geobits

Unless this is one of those tag moments...

Alex A.

@Dennis ^

Dennis

@Alex ^

Alex A.

7:25 PM

@Geobits kodak-moment fond-memories

flawr

filter instagram hashtag

Alex A.

instacrapchallenge

isaacg

@Dennis Right. In general, .u<lambda><anything> is repeat until fixed point, and .u<lambda><integer N><anyting> is the same as .u<lambda>U<integer N><anything>. The integer in the latter case is converted to its range.

Geobits

chat-roulette oh-god-why

flawr

I always find myself thinking about hashish whenever the word 'hash' comes up.

Alex A.

7:26 PM

@Geobits Many years ago my girlfriend went on chat roulette and just put her cat in front of the camera and left her there. She spectated off-camera, watching people attempt to get the cat's attention.

@flawr I'm glad I'm not the only one.

Geobits

Poor cat. Probably scarred for life.

Alex A.

Cookie's fine.

flawr

Cats are very durable. Cookies not so. We have a paradox.

Alex A.

She don't give a shit about anything but being warm and snuggling.

Geobits

Sorry, that was just my "pretend like I care about cats because this is the internet" mode activating.

It's been manually switched off now.

flawr

7:28 PM

@Geobits You missed the opportunity to use a tag.

Like cat or meow

Alex A.

Pet peeve: When people put their entire email message in the subject line and leave the email body blank.

> Any files for call - other than the one Adam sent last night (however, I expect Caleb's presentation to take most of time)

Geobits

I try to save tags for umm... important things.

Alex A.

@Geobits peanut-butter smooth status-bydesign

Geobits

I'm conflicted. See, Alex is always wrong (see the tag). But here he is not wrong.

flawr

@AlexA. chunky-or-not-chunky?

Alex A.

7:30 PM

@Geobits Then obviously alex-is-not-wrong.

Geobits

I wouldn't go that far ;)

Alex A.

@flawr occasionally-chunk-but-usually-not

isaacg

rabid-chat-weasels

2

Alex A.

@isaacg This describes me fairly well.

flawr

Haha, just today in the free commuters 'newspaper' there was a headline: "People who like coffee are psychopaths" I agree.

3

Alex A.

7:32 PM

@flawr As someone who likes coffee, I can confirm that this is true.

My dad roasts his own coffee. It's amazingly good.

flawr

I bet I could still resist=)

Dennis

@isaacg That's neat. Would it be possible to make .u detect infinite loops? .u?%N2h*N3/N2Q could work for the Collatz sequence.

Alex A.

@flawr Do you like tea?

I just realized that this makes it sound like I'm wrong.

39 mins ago, by Alex A.

you-are-correct-at-the-moment-i-am-not

flawr

@AlexA. No. @AlexA. Why would anyone think anything different?

Alex A.

What do you drink?

flawr

7:39 PM

water,ovo,sirup,bouillon

thats about it=)

Alex A.

So you drink eggs, syrup, and meat broth?

flawr

~~What???~~ I assumed those were the same in english, let me look those up.

Alex A.

Ovo = eggs, sirup = misspelling of syrup, bouillon = the salty concentrate from which broths are made

Like the Cards Against Humanity card: The gray nutrient broth that sustains Mitt Romney.

isaacg

@Dennis That should be doable. It could change functionality, but probably only rarely.

flawr

Ovo=milk with some brown powder called ovomaltine.

sirup=the correct spelling of sirup

Alex A.

7:42 PM

@Dennis I guess you'd better post that to the Pyth feature request question before it goes off topic. :P

flawr

bouillon=not only the salty concentrate but also the broth itself

i really like herbal and vegetable bouillon

Alex A.

So you drink chocolate milk, whatever "sirup" is, and vegetable broth?

flawr

Well, not all together, but other than that, yes=)

isaacg

@Dennis what do you think about changing u on 2 inputs to work that way as well?

feersum

Are you really sure it's syrup?

flawr

7:45 PM

Do you know those bouillon cubes that are not cubes?

Alex A.

@flawr Apparently ovomaltine doesn't contain sugar in Switzerland.

@flawr Yes

flawr

@AlexA. But is still sweet as f*** when you put enough of it into the milk.

Alex A.

It's made from malt extract, which is sweet.

But in the US it also has sugar.

(unsurprisingly)

flawr

@AlexA. My rule basically is you have to put enough powder into the milk such that the spoon stays upright.

Alex A.

So you drink sludge?

flawr

7:47 PM

Well you basically have to eat it if you do it that way=)

PS: Do you know Lucky Luke?

(French comic about a Cowboy who can fire quicker than his shadow.)

This is an opening sceene in one of those comics where the cook explains how to make coffe.

And he is saying that in the end you have to do the horseshoe check: If the horse shoe sinks, it was not enough coffee.

Alex A.

I'm pretty sure none of the following constitute "beverages": an ovomaltine concoction so thick that you have to eat it instead of drink it, some kind of syrup, and vegetable broth.

flawr

Why not? There is fluid in all of them and you ingest them from glasses/mugs?

Alex A.

If you have to eat it, it's no longer a beverage, right?

There's fluid in soup but it's not a beverage.

Vegetable broth is basically soup.

TimmyD

@AlexA. Is cereal a soup?

Alex A.

And I didn't know that one could drink syrup without dying on the spot.

flawr

7:52 PM

On the other hand you drink soup too, but it is still considered food.

Thomas Kwa

milkshakes?

flawr

@TimmyD No, soup is salty.

Well I hope your cereal is not salty.

Alex A.

@TimmyD Cereal refers to the grain-based thing you eat. It's just usually prepared with a beverage poured over it, such as milk.

What kind of syrup do you drink, @flawr? Like corn syrup? Maple syrup? Molasses?

TimmyD

~~Frosted~~ Salted Flakes. They're ... something!

Alex A.

@TimmyD Diiiiiiiiiisgusting

flawr

7:55 PM

@AlexA. No, like raspberry syrup or with any other fruits.

(Where sirup does not only refer to the sugary very viscuous fluid, but also to the beverage when you dilute this fuild with water.)

Alex A.

Ohhhhhhhhhhhhhh

Here I was thinking you drank the viscous sugar liquid.

Dennis

@isaacg That's also "repeat until change", correct? If yes, it probably makes sense.

flawr

@AlexA. But you can freeze it and make ice cubes out of it, very good in the summer=)

Somewhat offtopic: In those LuckyLuke comics there is always a (quite stupid) dog who eventually got it's own comic series. And as a reference to the original comic it has the slogan Rantanplan, the dog that is even more stupid than its shadow.

DankMemes

@flawr coffee is too bitter imo

Alex A.

@DankMemes Incorrect, -20 points

flawr

7:59 PM

@DankMemes alex-is-wrong +20 points.

DankMemes

so you'll downvote me with an army of 10 accounts?

flawr

How many does he have?

isaacg

@Dennis Check it out: pyth.herokuapp.com/…

PhiNotPi

I'll take "Alex is Wrong" for $2000, please.

Alex A.

Aug 2 at 2:48, by Alex A.

+20 points to @BrainSteel.

Chat points are different

@PhiNotPi You'll be out $2000 then.

@flawr Just the one, unlike some people I know.

glares at NotDoorknob

flawr

8:01 PM

Then what about @ಠ_ಠ ?

Alex A.

Oct 1 at 20:39, by Alex A.

@ಠ_ಠ is not my sock! (╯°□°）╯︵ ┻━┻

PhiNotPi

If anyone sees a PiNotPhi account floating around, I swear it's not mine.

flawr

ಠ_ಠ-is-not-alexa.

Alex A.

@PhiNotPi Does such an account actually exist?

@flawr flawr-is-correct

Dennis

@isaacg u@,/G2h*G3GQ for the non-cumulative case. Nice!

flawr

8:03 PM

What about @PhiIsPi?

Alex A.

I think PhiNotPi's username is proof that PhiIsPi is false.

Mmm ... pie ...

PhiNotPie

PieNotPi

PiePiePie

8:06 PM

PewPewPew

pewdiepie?

sucks

^

^

^

8:07 PM

yay, so we all agree on that

flawr

But still gets a ton of money.

Alex A.

^

DankMemes

I don't know how anyone can watch a dude screaming at his screen for hours

flawr

An Interview With PewDiePie

►

Optimizer

pew pew pew

DankMemes

8:08 PM

similarly, IDK how anyone can watch like the world cup or super bowl for hours

boring watching people do stuff

I'd rather play games/sports myself, even if I suck at it

Optimizer

PLOT TWIST - the guy in the video is a jet plane pilot and the video ends with him crashing his plane

TimmyD

The Super Bowl is 6 hours of television to show 20 minutes of actual gameplay

Alex A.

@Optimizer optimizer-is-pilot flawr-is-plane

Sven The Surfer

@DankMemes Objection! I don't agree. Shower me with down-stars.

Optimizer

alex-a-is-crash

flawr

8:10 PM

Funny coincidence: Today a swiss F/A18 crashed.

(In france.)

Optimizer

PILOT TWIST

DankMemes

blame-doorknob

ok I'll stop it's not funny anymore

Optimizer

okay srsly, @AlexA. created another sock ?

oh, DankMemes is a real user..

flawr

(c) by Alex A.

Optimizer

DankMemes even has a TM

Alex A.

8:12 PM

@Optimizer hahahaha

Optimizer

you are doing the evil laugh because you fooled me in believing that he is a real user and not your sock?

DankMemes

sock?

interesting term you guys have

why not just say alt

test account

flawr

@DankMemes Less fun.

El'endia Starman

@DankMemes Refers to a hand sock. A puppet.

DankMemes

I understand that

:P

El'endia Starman

8:14 PM

Like the...eh, Muppets...

TimmyD

It's a perfectly cromulent word.

Alex A.

DankMemes: "I understand." El'endia: Continues to explain.

2

DankMemes

^

El'endia Starman

Well, it's often not for legitimate reasons...hence the masquerade and why it's called a sock and not an alternate or test account.

DankMemes

@TimmyD I had to go look that up DX

El'endia Starman

8:15 PM

Me: continues to continues to explain.

Alex A.

Now you're just explaining because I called you out on it. :P

For teh lolz

El'endia Starman

I already had it in mind but I couldn't resist... :P

Optimizer

why the stars?

flawr

Why not?

Alex A.

It's like the Milky Way

Optimizer

8:16 PM

I am out of context today.

El'endia Starman

@Optimizer You're digging for stars here aren't ya?

So many star

no

@AlexA. I see no stars. There are just pixels.

André Muta

8:17 PM

Who told me the site to make equations into images to post here? I lost the link.

El'endia Starman

@AlexA. Hey wait, that's the Pleiades, right?

Alex A.

@AndréMuta I don't know said it before but you can try this: quicklatex.com

@El'endiaStarman That's the first Google Images result for "stars"

El'endia Starman

No, there's a way to do it with codecogs that's better.

flawr

@AndréMuta I use this one here: codecogs.com/latex/eqneditor.php

Alex A.

Oh right. That's the one I've used before.

I was thinking the one I linked to didn't look familiar.

TimmyD

8:20 PM

2 hours ago, by minxomat

Use !http://latex.codecogs.com/gif.latex?<yourlatexhere>

flawr

André Muta

\boldsymbol{y = ax+b}

El'endia Starman

@TimmyD That's what I was thinking of!

André Muta

How should this work?

El'endia Starman

~~!http://latex.codecogs.com/gif.latex?\boldsymbol{y = ax+b}~~

André Muta

8:21 PM

$user image$

El'endia Starman

Hmm. That didn't work.

André Muta

Oh, got it

true

Optimizer

symboly is bold.

André Muta

$user image$

URL Encoded

El'endia Starman

Yeah, I know you can do it that way.

Optimizer

8:22 PM

![]()

André Muta

But how I put this on a post?

like a normal link?

El'endia Starman

Click the "insert image" button?

flawr

a

André Muta

Worker @Optimizer

worked*

Optimizer

I answer before questions

5

André Muta

8:24 PM

Hahahahahhahah, I just realized that

Here, have my upvote

DankMemes

@AlexA. wow, so amaze, such space, many star

TimmyD

Pre-emptive ninja'd

flawr

TimmyD

@flawr The "M"

Here in Minnesota, we measure distance in hours, so ...

2

flawr

@TimmyD That is meters

Beta Decay

8:35 PM

@flawr Well, for one is it meters per hour or miles per hour

In which case it should be miph

Alex A.

If distance is measured in hours, it's hours per hour, and you always travel at a speed of 1 hour/hour.

TimmyD

Makes calculations easy

flawr

@TimmyD So how many hours are you tall?

@TimmyD Or how many square hours is a 1m^2?

Alex A.

I'm 219,000 hours old.

Actually, +24*(days since 9/18)

DankMemes

gravity has an acceleration of 1337 hours/hour^2

flawr

8:38 PM

How much is that in meters?

Alex A.

I'm 48 meters old.

flawr

And one gallon is 0.LEET exactly cubic feet.

Alex A.

Ah yes, using n00b's formula.

DankMemes

My mass is 42 kilometers

TimmyD

@flawr I'm 0.06118 seconds tall

Beta Decay

8:39 PM

I weigh 12 footpounds

PhiNotPi

In what base system would 1 gallon = 0.LEET cubic feet?

flawr

@AlexA. You mean 219'000 hours?

@PhiNotPi Base 10.

Alex A.

@flawr I do not mean that because I'm not European. :P

DankMemes

well you could measure distance in light-hours and light-seconds

Alex A.

Yeah but those are actual distance measurements.

Beta Decay

8:40 PM

@AlexA. Note that the British are European and we think that's a weird system

DankMemes

that's the point

flawr

Lets use pounds/stones/grain/oz per acrefeet as an unit of density.

PhiNotPi

wolframalpha.com/input/…

DankMemes

how about birds / hour ^3

perfect unit of density

TimmyD

@flawr Makes just as much sense as lb-ft does for torque ...

flawr

8:44 PM

@TimmyD Are these nautical feet?

Alex A.

My feet are not in the water.

flawr

@AlexA. Your feet are water.

Alex A.

Mostly, yes. As is the rest of me.

TimmyD

"Ugly bags of mostly water."

flawr

When doing a golf intro course I learned that humans actually sound like bags of water if you hit them hard enough with golf clubs in the face.

6

Beta Decay

8:48 PM

...

flawr

I was not one of those involved.

El'endia Starman

@TimmyD Foot-pounds actually do make good sense.

Beta Decay

@flawr Uhuh, is that what you told the police too? ;)

flawr

What is the imperial unit for force?

feersum

@flawr I assume by golf clubs here you mean IDEs.

El'endia Starman

8:50 PM

@flawr Newtons?

DankMemes

lbf

pounds are a unit of force already

one slug ft/s^2

flawr

@DankMemes So what is the unit of mass then?

DankMemes

slug

apparantly

and then there's like a dyne for energy and something or another for power

El'endia Starman

Horsepower?

IIRC watts is metric power.

DankMemes

nvm dyne is metric

I'm getting confused

feersum

8:51 PM

Where do BTUs fit in?

DankMemes

horsepower yeah

not sure

El'endia Starman

BTUs are energy.

André Muta

getting better? meta.codegolf.stackexchange.com/questions/2140/…

TimmyD

Imperial units

The system of imperial units or the imperial system (also known as British Imperial) is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced. The system came into official use across the British Empire. By the late 20th century, most nations of the former empire had officially adopted the metric system as their main system of measurement; however some imperial units are still used in the United Kingdom, Canada and other countries formerly part of the British Empire. The imperial system developed from what were first known as English...

To be fair, I've heard of maybe 75% of those. American English is ... loose ... with definitions.

El'endia Starman

same

DankMemes

8:54 PM

so if I heat an object to 1337 BTUs at standard pressure then increase the pressure to 9999 lbf / ft^2 while keeping volume constant at 400 ft-acres then how many horsepower can it output if it goes back to stp in 1 hour?

TimmyD

@DankMemes Enough to travel time.

DankMemes

interesting

El'endia Starman

@DankMemes ......I think the dimensional analysis doesn't work out here, so this is an invalid question. :P

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

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