Wolfram Mathematica

rcollyer

1:05 AM

@Heike we've named our wireless access point: here be dragons.

I've always wondered what the neighbors thought. Then I came to my senses and realized I didn't care.

belisarius

1:56 AM

@rcollyer Hehe we renamed it as "SpyBot", and our log of intrusion intents is now almost nil

rcollyer

3:50 AM

@MrWizard Yes, that is frightening. And, doesn't raise any notification flags. Maybe I should flag it with SE for abuse by a mod. :P

Heike

11:10 AM

@JM I think legending means the process of becoming a legend

@rcollyer That's a good one. Mine is just called "home network".

J. M.

@Heike Beats leaving your access point named "linksys"...

Heike

@JM There are several access points called linksys in my neighbourhood and a few SpeedTouch*

This was actually a temporary name and I was planning to give my network a more original name, but by the time I got everything working I couldn't be bothered anymore.

J. M.

@Heike That's okay. Like I said, at least you changed the SSID...

Mr.Wizard

12:02 PM

@rcollyer I'm only trying to inform; I was quite surprised to learn that moderators could edit other people's comments. Delete, sure, but change someone's words nearly transparently? That's a little disturbing, though I'm sure the history of edits is there for the devs to examine in a major incident.

J. M.

@MrWizard I use that ability to fix typos in comments from time to time.

Mr.Wizard

12:47 PM

@JM As do I. I still think it probably comes as a surprise to the majority of users.

Eli Lansey

1:09 PM

@JM i was thinking legending, plotting, etc.

rcollyer

1:44 PM

@MrWizard I was not aware, but it didn't surprise me, that you could do that. That being said, apparently the joke about me reporting you did not come through as planned. Sorry.

Faysal Aberkane

2:46 PM

Hi would it be possible to import this post stackoverflow.com/questions/8362170/… and this one stackoverflow.com/questions/5459735/… to mathematica.stackexchange ?

J. M.

@FaysalAberkane You could try flagging them for migration.

Faysal Aberkane

@J

@JM how can I do that ?

J. M.

There should be a "flag" link at the bottom of the question. Click, follow instructions.

Faysal Aberkane

ok

acl

3:14 PM

0

Q: Charge System Search (CSS) optimization code

I write a code for a new optimization method css , it works good. you can use this new method in your works. but in this code you can consider the constraints as a range x1->[a,b],x2->[c,d],... If you like , modify this code for other constraints this a code and comparison with NMinimize: In[581...

Szabolcs

4:38 PM

There's someone named "M.J." asking repeated questions using different unregistered accounts. Should get him to register.

belisarius

@Szabolcs I think he is the antiparticle of J.M

J. M.

@belisarius I'm not seeing any annihilations so far...

belisarius

@JM Just try to merge those two accounts and you'll see JM disappearing from the site

J. M.

@belisarius You're going to have to wear very dark glasses if that happens...

belisarius

@JM :=D

Verbeia

9:12 PM

What do people think about this suggested edit? mathematica.stackexchange.com/review/suggested-edits

It seems to be noticeably changing the scope of the question.

Verbeia

9:34 PM

Hmm Bill the Lizard and David Fullerton both joined Mma.se today.

R.M

@Verbeia get ready for some reddit/twitter action

@Verbeia I rolled back the change (JM rejected it, but they submitted again and Artes approved)

Verbeia

Thanks @R.M looking at the post comments I see I should have rejected anyway. Looking forward to the reddit/twitter action.

belisarius

@RM In addition to some up/down voting, could the reddit/twitter exposition bring anything else to the site? (newbies? experts? questions?...)

R.M

@belisarius you don't see much up-down voting here as you do on Stack Overflow... probably because most people already have SO accounts and not everyone wants to create an account on a site that they don't have use for

I guess this early in the site's life, it helps to get the word out that there is a neat site for mathematica questions... it'll get a few people interested

Heike

@RM Also, you need some rep to be able to down vote.

R.M

9:50 PM

yes, that too

was there some question that went viral or in the hot questions list last night (day/evening depending on where you are)?

Heike

@RM I don't know. Why do you ask?

belisarius

there were a few nice ones

Heike

@belisarius Those aren't always the ones that float to the top of the hot list

R.M

@Heike I typically see a spurt (not a huge number) of new accounts from people already in the SE network when something is interesting... they probably come in to upvote

Oh well... maybe not to upvote/share. I think I've figured out why Bill joined

belisarius

@Heike Actually all those I remember as "good questions" are currently in the "active" page

R.M

9:55 PM

Bill migrated this question from SO 10 hrs ago and his account was created 10 hrs ago. He must've noticed that it's already a dupe here after migrating and flagged for mod attention. He has a Citizen Patrol badge for that.

Heike

@belisarius It seems that I missed a few interesting questions today.

belisarius

@RM I made a comment saying it was cross posted. My comment is now gone.

belisarius

10:08 PM

@Heike Are you there?

Heike

yes?

belisarius

Please check your spiral code with testList = Union@Table[i ^(1/2) , {i, 1, 20}];

Is that a spiral?

My code gives the same result ...

Heike

@belisarius I get this:

As spirals go, it's a bit wonky.

belisarius

4 >5 ??

R.M

I thought the goal was to sort the circles and then form the spiral

belisarius

10:12 PM

they are already sorted ...

naaaa

They are not!

Heike

They are sorted in the Mathematica way

belisarius

The Union[] thing disorders it

yep

Heike

That silly sorting thing still throws me sometimes. Why on earth would you want {Sqrt[2], Sqrt[3], 3} to be sorted as {3, Sqrt[2], Sqrt[3]}

belisarius

@Heike I used to have a SortN[] function in my inits. I then lost a few files in a machine crash and that was one of the victims

Heike

something like list[[Ordering[N[list]]]] ?

belisarius

10:25 PM

@Heike Probably, I really don't remember exactly what I did. But what I do remember is that it dealt with a few corner cases

acl

hmmm ListConvolve is not to be used when tired

belisarius

@acl Convolutions work better early in the morning

2

acl

convolutions are fine, what's not fine is trying to work out how to use `ListConvolve` with lots of arguments like`ListCorrelate[{{0, 1, 0}, {1, 0, 1}, {0, 1, 0}},
Array[m[#1, #2, 5] &, {5, 5}], {1, -1}, {}, f, g]`

I think I'll just write a big do loop and get it over with. I can fix it tomorrow (TM)

3

belisarius

@acl sure :D

starred

acl

or I could just stop programming; it's past midnight

I am starting to hear the beers calling from the fridge

3

belisarius

10:35 PM

@acl You may drink a few beers for waking you up

Heike

Don't feed the compiler after midnight, or it will turn funny.

acl

@belisarius always does the trick.

belisarius

xckd mandatory

bahhh, just imagine it. lazy to post.

@Heike The Compilers Union could make a riot. One have to be careful.

Heike

@belisarius you could always bribe them with coffee

belisarius

Damn chapter 11

@Heike I remember there was a VERY nice IT magazine in the 80's named Computer Languge, Jolt Cola advertised there :)

Heike

10:49 PM

@belisarius Jolt cola is an actual brand? I thought is was a spoof from a cartoon or so.

Like Duff from the Simpsons

belisarius

@Heike It WAS. Filled for chapter 11 on 2009.

Jolt Cola

Jolt Cola was a carbonated soft drink produced by Wet Planet Beverages. It was created in 1985 by C. J. Rapp as a highly caffeinated cola. It is targeted towards students and young professionals, stressing its use as a stimulant in a similar manner as energy drinks. In late September 2009, Jolt Co Inc (Wet Planet Beverages) filed for Chapter 11 bankruptcy after failing to meet the demands from Rexam to fulfill an agreement over buying resealable cans. Emigrant Savings Bank, the main creditor, then acquired the Jolt assets and relaunched the business. Jolt Cola in North America Jolt Col...

Heike

Ah, that's what the chapter 11 was referring to. I wasn't familiar with that term

belisarius

Seems they are still producing it, after bankrupcy

R.M

I'm creating a new unit foo and I define it something like

belisarius

With a caffeine concentration of 32 mg per 100 mL, these bottles (of Jolt Cola) contain a claimed 192 mg.

R.M

10:54 PM

foo /: Times[x_, foo] := x^2

belisarius

Consumption of large amounts of caffeine – usually more than 250 mg per day – can lead to a condition known as caffeinism. Caffeinism usually combines caffeine dependency with a wide range of unpleasant physical and mental conditions

R.M

So 2 foo is 4, and so on... The problem is with 1 foo which evaluates to just foo

belisarius

@RM Try with bar

R.M

I did, but baz got jealous

Now, I do have a kludgy fix to this... I defined N[foo]=1 and use //N in places where I use foo units (it doesn't matter that they're not symbolic)

so 1 foo //N works... but seems awkward.

Is there something simple I'm missing?

acl

@belisarius wow, more than 250mg is excessive?

apparently two normal cups have ~250mg...

belisarius

11:01 PM

@acl Wikipedia dixit. I always trust what I read on the Internet.

acl

@belisarius yes I googled it and found the wikipedia entry. has to be true

Heike

@acl I drink a lot more coffee than that.

No wonder I'm still online even though it's past 1am here.

belisarius

@Heike That is fixed with a few beers before bed

No more than tenn

No more than ten

Heike

@belisarius Nah, beer usually gives me funny dreams.

belisarius

@Heike There are alternatives, but beer is cheaper

belisarius

11:22 PM

@Heike I was trying to make my spiral recursive to draw "spirals in spirals" like the one the OP posted in the question. I got dizzy.

Heike

@belisarius How would you calculate the radius and centre of the the circle enclosing a sub spiral?

R.M

anyone else with an (as of yet) unbroken visit streak?

Heike

@RM me. 151 days consecutive according to my profile.

R.M

Same here, although that's going to break soon

Verbeia

And me, same number

R.M

11:34 PM

At least, I have the Fanatic already, so any more consecutive runs is useless

Verbeia

I will break in a few months: big holiday planned :-)

The list of fanatic badge holders contains some people I would not have expected

R.M

Don't be surprised by this guy

belisarius

@RM Why?

R.M

@belisarius Guess what each of those gold badges (even on metas) is for ;)

belisarius

@RM I can't believe it. He/She should be a bot

R.M

11:43 PM

It's possible they're running a script to log their visits...

belisarius

@Heike I was doing it the easy way. Suppose you have a radii list {a,b,{c,d}}. Then calculate first {c,d} as if was centered at the origin, and prepend to the list of circles a big covering circle e. Then preocess {a,b,e}, and when you have the coordinates for the center of e, add them to {c,d}. All this recursively, of course

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