Jens
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 Apr 18 comment Custom operator form for system functions? How about Infix notation? It looks nice for your example: Range[10]~RandomSample~3. No need to Unprotect anything. Apr 17 comment How to make this beautiful animation I think I've managed to find the source of the animation and added it to the question. In searching for it, I saw how rampant it is to rip off original art like this. Apr 17 comment How can I create a graphic of a wedge of a cylinder (like a slice of pie)? I made a function that can do that as part of this answer. It's called ellipse3D Apr 16 comment How to make this beautiful animation I strongly endorse the question by @ColtMcCormack as to the source of the animation posted in the question. You can't just post things like that without giving proper credit. Apr 16 comment For loop works at top-level but not in a function OK, I've added an explanation. Apr 16 comment Approximating for $a \gg b$ @DanielLichtblau Your suggestion is the continuation of what I initially proposed, but what Lucas claimed "fails badly" - so I think he really wanted something that looks like what he wrote - numerical accuracy wasn't enough for him. That's why I settled on the O method instead. Apr 16 comment For loop works at top-level but not in a function With a slight modification it works - see my answer. Apr 16 comment For loop works at top-level but not in a function What is the input you're using? To reproduce the error you should let us know what list you actually used. Apr 14 comment Is there a way to diagonally strike through a character or group of characters in a DisplayForm equation? @ibeatty Thanks - looking at your last comment, I'm glad your original answer wasn't 42 because then I wouldn't know the question... Apr 14 comment Is there a way to diagonally strike through a character or group of characters in a DisplayForm equation? @ibeatty I think it's fixed now. Apr 14 comment Is there a way to diagonally strike through a character or group of characters in a DisplayForm equation? @ibeatty I added a palette that automates things. Apr 14 comment Plot a alphabetic character in 2D Yes, that's why you get this. But do you want a smooth curve, or just a way to calculate more points? It's not clear. Apr 14 comment Plot a alphabetic character in 2D Obviously ListPlot can work only if you add more points. Maybe you want this? Apr 13 comment Is there a way to use iframes in a notebook? The closest (that I know of) to what you're asking is that you can embed a movie from the web in a Dynamic cell, as I do here in edit 3 of this answer. However, it only works if you have the URL of the actual movie data. Apr 13 comment ToExpression and ToBoxes aren't inverses of each other? @AlexeyPopkov I already upvoted the first version... Apr 13 comment Approximating for $a \gg b$ @Lucas Maybe the edited answer does what you want... Apr 13 comment Approximating for $a \gg b$ @Lucas Whether to call it failure depends on what precisely you consider the small parameter. The info you initially gave is not sufficient to define what you wanted to do with ArcTan, so I picked one of many ways to do it. Apr 13 comment Can you plot pure function without specifying variable? @J.M. Yes - but one person's loss is another person's gain - sometimes the sampling slows plotting down and you end up turning it off anyway... Apr 12 comment Is there a way to diagonally strike through a character or group of characters in a DisplayForm equation? For a single character, you can perhaps get by with this: How to use Feynman Slash notation? Apr 12 comment ToExpression and ToBoxes aren't inverses of each other? You're right, Hold[1/1] is treated differently, apparently multiplied by 1 (checked for version 8). But is there any place in the docs that says ToExpression and ToBoxes are inverses of each other? I don't think that's what defines them.