Wolfram Mathematica

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ilian

1:06 AM

@halirutan definitely something to be fixed (the documentation, that is)

halirutan

@ilian yes, because this is some awesome information!

Michael E2

1:59 AM

@halirutan Rojo used it here, and I used it here. I've also seen it while spelunking. (Never read the manual, though, or rather never noticed what you pointed out.)

halirutan

@MichaelE2 I never needed it and I was shortly looking at Szabolcs question and saw that it is mysterious how it works.

Now I know (I checked all kinds of values and stuff, but didn't looked that the messages themself)

Michael E2

@halirutan I can't tell you where I picked it up. I hardly ever use it. Probably I executed a message I turned off.

2 hours later…

xslittlegrass

4:33 AM

Hi, a quick question, what's the default Plot3D style in version 10.2? For example, in Plot3D[{Sin[x + y^2], Cos[x + y^2]}, {x, -3, 3}, {y, -2, 2}] there are two surfaces with two different colors, how can I plot only the second one with the same style Plot3D[Cos[x + y^2], {x, -3, 3}, {y, -2, 2}]?

4 hours later…

Patrick Stevens

8:44 AM

@halirutan yep: Off[NIntegrate::precw]; NIntegrate::precw returns $Off[]

i'm so confused

Off[NIntegrate::precw]; On[NIntegrate::precw]; Off[NIntegrate::precw]

then `In[10]:= NIntegrate::precw

Out[10]= $Off["The precision of the argument function (`1`) is less than WorkingPrecision (`2`)."]`

it's not $Off[] any more

3 hours later…

Verbeia

12:02 PM

Has anyone installed the egis github add-on in Eclipse Kepler for use with Wolfram Workbench in Kepler? Just wondering if there are any traps for young players.

Szabolcs

12:31 PM

@ilian Yes, thank you!

@ilian @halirutan Well, there's a lot in the documentation that is not technically correct ... but sometimes the simple and inaccurate explanation is much more educational and conveys the intent better. The other day I came across an annoyance with shadowing messages. The docs say,

"This message is generated when symbols with the same name occur in more than one context and both contexts are in the context search path."

Well, it turns out that's not exactly how it works ... but the description certainly explains well the intent behind the message.

I had an unusual package structure like this:

MySymbol (* this exists in some non-System context, e.g. Global` *)
BeginPackage["foo`"]
BeginPackage["`bar`"]
MySymbol
EndPackage[]
EndPackage[]

This triggers shadowing warnings, even though foo`bar` and Global` never appear in $ContextPath (or $Context) simultaneously.

I can imagine reasons why it's implemented like this.

Michael E2

1:08 PM

@PatrickStevens NIntegrate loads the message on demand. Until then, it's undefined.

Patrick Stevens

@MichaelE2 ah, that makes more sense

1 hour later…

belisarius

2:13 PM

Is it that awesome?

edition.cnn.com/2015/09/17/arts/math-art/…

example:

$user image$

Next da Vinci? Math genius using formulas to create fantastical works of art

I don't even like them ...

kirma

I don't quite spot the "amazing" part they apparently are hyping up, but tesselations are definitely more interesting stuff than the rest.

This strange "math is hard" public, or at least mass media attitude...

belisarius

2:30 PM

@kirma Yeah, well. Another we-need-to-fill-that-page hyped title

PlaysDice

2:42 PM

On v 10.0.2 Quantity[Quantity[1, "Days"], "Hours"]

gives 24 h (squared). Is it just me ?

The Toad

@belisarius I didn't know you were from Africa =)

belisarius

@TheToad Cartography is an art :)

1 hour later…

halirutan

3:45 PM

@belisarius Is she 5? Then yes.

@PlaysDice No, it's not just you, but look here

UnitConvert[Quantity[1, "Days"], "Hours"]

belisarius

@halirutan :)

Pickett

4:14 PM

His name means "praiseworthy" in Arabic, thus completing the farce.

belisarius

@Pickett But it's a common name also. Anyway ..:)

@Pickett " His art method is a bit like fishing with a large net"

Hamid Naderi Yeganeh

Hamid Naderi Yeganeh (Persian: حمید نادری یگانه‎; born July 26, 1990 in Iran) is an Iranian mathematical artist. He is a student of mathematics at the University of Qom. Naderi Yeganeh won a gold medal at the 38th Iranian Mathematical Society’s Mathematics Competition in May 2014 and a silver medal at the 39th IMS’s Mathematics Competition in May 2015. He has introduced a method to find some mathematical shapes like something in real life by using trigonometric functions in the complex plane. His art method is a bit like fishing with a large net. By that method he has found some shapes like bird...

He hasn't done even buttocks

@halirutan It's a "he"

halirutan

4:31 PM

@belisarius It was a double joke :-)

YungHummmma

Hey guys, I have a config file I produced from another program that has values listed of the form someparamater = "its value", and I'd like to extract the value, by giving someparameter... is there a clever way of doing that?

halirutan

@YungHummmma This looks like Java properties files.

I don't know whether Mathematica has support for it, but it shouldn't be hard to do it by yourself.

YungHummmma

@halirutan, it's actually from Labview's config file VIs

Yeah, I mean, I know there's definitely a way to do it, I was just wondering if there was a simple function that you could give the search term and delimiters or something

FindList finds the line... from there I guess I can do it pretty easily

halirutan

@YungHummmma an easy ways it probably to read the file and turn it into a list of {someparameter -> "its value", ...}

belisarius

$user image$

so proud!

halirutan

4:38 PM

This can then easily be used to do what you want.

YungHummmma

Yeah, Import with option "table"...

halirutan

@YungHummmma Or just ReadList and read and transform each line separately.

YungHummmma

Huh

Well, readlist is giving me errors I don't really understand even though it seems like I'm following the correct syntax, so I'm gonna go with Import and "table"

Alright, this is embarrassing, but is there a slick way to get the pair with a search item, from a list of pairs? I have always done a stupid thing of using Position[] and then indexing that

but there's gotta be a better way

Oleksandr R.

5:02 PM

hftf

5:14 PM

Anyone else see mathjax rectangles here? mathematica.stackexchange.com/search?q=unexpected+block

YungHummmma

hohyeah

PlaysDice

5:53 PM

@halirutan thanks for checking. Odd behavior (Quantity[Quantity... ] ) but your work around is appreciated! Even appreciated ^2 ! :)

PlaysDice

6:10 PM

@halirutan ... I took another read of the Docs and I can see that the first variable in Quantity is a (numeric, absolute) magnitude and my passing Quantity in there messed it up. So, maybe not unexpected behavior, but just not what I was er, expecting.

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1 hour later…

William

7:43 PM

If anyone is interested in a bounty

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What is the easiest way to accomplish the following in a Mathematica clone or in any version of Lisp(any language is probably okay actually even Haskell)? Also it doesn't appear any lisps have a similar replace function. Replace[ { f[{x, "[", y, "]"}], f@f[{x, "[", y, y2, "]"}] } , f[{x...