Wolfram Mathematica

12:49 AM

Aw, nobody's around again? Oh well...

Vitaliy Kaurov

1:44 AM

@J.M. very neat anims. please feel free to post those and code on Wolfram Community. The one you did with Enneper surface was also very nice.

halirutan

1:57 AM

@kirma Well.. what can I say. It does take a very specific kind of intelligence to know what you get when you search for "ideal gf".

Usually people that know this and people that know about galois are very different :-)

3 hours later…

kirma

4:31 AM

@halirutan :)

5 hours later…

Jacob Akkerboom

9:39 AM

Strange that a user could make this comment when it was not his own post and he had only 1 rep.

10:23 AM

@JacobAkkerboom The user originally posted an answer; Verbeia, quite rightly, converted it to a comment.

@VitaliyKaurov It might take a while; for me, it's easier to write code than to write understandable explanations. :)

Jacob Akkerboom

10:42 AM

Ah yes, of course. Too bad that user didn't post a proper question after that exchange.

2 hours later…

12:35 PM

Why

MovingMap[f, Range[5], 1]
MovingMap[Apply[Rule], Range[5], 1]

gives

{f[{1, 2}], f[{2, 3}], f[{3, 4}], f[{4, 5}]}
MovingMap[Apply[Rule], {1, 2, 3, 4, 5}, 1]

12:55 PM

@Kuba Weird, yes. But MovingMap[Apply[RuleDelayed], Range[5], 1] works.

@J.M. try with RandomReal too, something is not ok with evaluation

@Kuba MovingMap[Rule @@ # &, Range[5], 1] doesn't work either. Worth a question or a bug report, I think.

Q: What's wrong with MovingMap + Apply[Rule] etc.?

@J.M. done

I don't why this happens, I don't know if those two examples are related. I don't have time to investigate, but maybe someone can solve this? MovingMap[Apply[RandomReal], Range[5], 1] MovingMap[Apply[RandomReal], {1, 2, 3, 4, 5}, 1] TemporalData::dmnsns: The dimensionality implied by ...

functions

1:17 PM

@Pickett Thanks. I assumed an explanation about the reset of the $AssertFunction was secondary quest.

2 hours later…

Q: Detecting an ellipse in a glaucoma photo

3:34 PM

Ha! 17 upvotes and it was a Matlab question. Crazy thing

For glaucoma diagnosis it is common to determine a "cup to disk ratio" which compares the diameter of the optic disk (VDD) and optic cup (VCD). The optical disk is visible as a circular red feature (red channel) and the optic cup shows up as a yellow circle (green channel). How can I calculate th...

image-processing fitting

@belisariushassettled :D

R. M.

@belisariushassettled wow... just. wow.

3:50 PM

@R.M. @Kuba really unexpected :)

kirma

4:09 PM

Sigh... RegionBounds with machine-precision ImplicitRegions can return quite bogus results...

RegionBounds[ImplicitRegion[((0.5 - x)^2 + (0.75 - y)^2 + (-0.75 - z)^2)^-1 + ((-1. - x)^2 + (-0.25 - y)^2 + (0.25 - z)^2)^-1 > 20, {x, y, z}]]

rcollyer

@belisariushassettled I suppose you could point him to matlink. :)

4:31 PM

@rcollyer :D

Is there any way to know what color is PalleteNotebook background? Without assuming it is CurrentValue["PanelBackground"]?

2 hours later…

Szabolcs

6:16 PM

People who use MaTeX: please consider upgrading to version 1.1.0 and let me know if anything is broken! https://github.com/szhorvat/MaTeX/releases

There are no functionality changes. It's mostly about reliability and auto-configuration on the first run. The auto-config code will only be triggered if you reset the configuration by deleting the `$UserBaseDirectory/ApplicationData/MaTeX` directory. If anything fails, please let me know!

Jacob Akkerboom

6:51 PM

@Kuba Herm is that some kind of stylesheet type option you are looking for? I only know that the option Background also applies to palettes

Sjoerd C. de Vries

7:06 PM

@belisariushassettled what an idiot. Those upvotes were totally undeserved.

@SjoerdC.deVries It took me completely by surprise. People just find a site and drop their question. There are so many of them doing that without caring what the site is about! I believe they stumble upon other things in life in the same way ... politics, marriage, careers ..

Sjoerd C. de Vries

7:51 PM

@belisariushassettled Did you spend much time on it?

Wolfram Blog: Aspect Ratios in Art: What Is Better Than Being Golden? Being Plastic, Rooted, or Just Rational? …

8:07 PM

@SjoerdC.deVries Ha! mostly googling for glaucoma resources :)

@SjoerdC.deVries I wanted to check if something useful could be done by simple image processing. Turns out that the problem (as all real life ones) is pretty complicated and the medical "definitions" are a blurred mess

Wolfram Blog

8:25 PM

posted on November 18, 2015 by Michael Trott

Paintings of the great masters are among the most beautiful human artifacts ever produced. They are treasured and admired, carefully preserved, sold for hundreds of millions of dollars, and, perhaps not coincidentally, are the prime target of art thieves. Their composition, colors, details, and themes can fascinate us for hours. But what about their outer [...]

3 hours later…