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Questions on undocumented functionality of Mathematica. Note that such functions might be subject to change without notice in future versions.

18
votes
I hope it's not bad form to revive such an old thread, but FilledCurves can have more than one component. To handle things like glyphs for "o" and "i" that have multiple boundaries, you need to map @ …
answered Dec 23 '12 by Michael E2
7
votes
See How to make the computer consider two numbers equal up to a certain precision and the linked SO answer for more details. This question is similar to the first one, except the OP here wants the tol …
answered Feb 28 '16 by Michael E2
26
votes
Such functions set up a one-time iterator, i.e. a GeneralUtilities`Iterator. Its functionality may be inspected with ? GeneralUtilities`Iterator and so forth. Except for a ConstantIterator which a …
answered Jan 22 '17 by Michael E2
22
votes
One can use Style and FractionBoxOptions to set Beveled: Plot[Sin[x], {x, -2 Pi, 2 Pi}, Ticks -> {Pi Range[-2, 2, 1/2], Automatic}, BaseStyle -> {FractionBoxOptions -> {Beveled -> True}}] It do …
answered Oct 8 '13 by Michael E2
7
votes
What happens is that if a requested property p is not one of the standard "Properties", CountryData then computes EntityValue[Entity["Country", <standard name>], p] For example, the possible entity …
answered Nov 22 '14 by Michael E2
15
votes
NIntegrate Method options There are many Method settings to use in NIntegrate and many but not all of their suboptions are documented the tutorial on NIntegrate. Some of these may be found by ?NInt …
answered Dec 25 '13 by Michael E2
2
votes
Like J.M., I see the "DivergenceTest" (Nth term test for divergence) as well as user-defined methods. The "DivergenceTest" can only be used to show divergence (return value False). If it returns Tru …
answered Jan 9 '18 by Michael E2
2
votes
The internal function Integrate`InverseIntegrate[] tries what I call the "obvious" substitutions, namely, u == g[x], where g[x] appears as the argument to a function in the expression being integrated …
answered Oct 19 '16 by Michael E2
8
votes
Here is a partial answer. I believe for Method -> {opts}, opts may be any of the following, and they will have whatever effect they have: Internal`InequalitySolverOptions[] Internal`ReduceOptions[] …
answered Jul 29 '15 by Michael E2
6
votes
First note they are not equivalent: PolynomialQ[x + x[1], x] Internal`PolynomialFunctionQ[x + x[1], x] (* True False *) Second note that PolynomialQ does a lot of checking: Trace[ PolynomialQ …
answered Feb 16 '16 by Michael E2
2
votes
The only place I've found an effect is Block[{Charting`$MajorTickLength = 15}, CandlestickChart[{"C", {{2010, 1, 1}, {2010, 1, 15}}}, TrendStyle -> {Green, Red}] ] Compare with the default: …
answered Aug 12 '17 by Michael E2
7
votes
Below are a bunch, although they seem to be a compilation of options for many or all plotting functions, including (mainly) 3D functions. As @belisarius remarked in a comment, using ?NumericQ is the …
answered Aug 29 '15 by Michael E2
5
votes
Introduction I thought I would present a way to leverage built-in functions to do this. I've known for a long time that NDSolve sets up an ODE problem as system of first-order equations, so the basic …
answered Dec 4 '16 by Michael E2
4
votes
I think the problem is that in TM[m p[t].Range[0, nmax]], the NDSolve "variable" p[t] is incorporated into the SparseArray and protected from being assigned a value in whatever way NDSolve achieves th …
answered Aug 2 by Michael E2
8
votes
I found one: For ParametricPlot3D (and Plot, Plot3D), Method -> {"BoundaryOffset" -> False} causes the sampling to include the end points of the interval(s), for both surfaces and curves. By defa …
answered May 17 '18 by Michael E2

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