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Results tagged with undocumented
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user 6358
Questions on undocumented functionality of Mathematica. Note that such functions might be subject to change without notice in future versions.
17
votes
Accepted
Can't make more than 249 Internal`Bags in a Table
Seems to be the same underlying issue as here: by default, Table compiles its argument when the number of values is 250 or more. Evidently Internal`Bag doesn't like this!
If all Internal`Bags are th …
- 20.4k
2
votes
1
answer
100
views
Using TemporalData`DropTimes
I'm not able to figure out how the undocumented command TemporalData`DropTimes described here works. …
- 20.4k
13
votes
1
answer
197
views
Can't make more than 249 Internal`Bags in a Table
I need a lot of Internal`Bags so I made them with Table. It works fine for 249 or fewer Bags but goes horribly wrong for 250 or more:
Table[Internal`Bag[0], {i, 249}]
(* {Internal`Bag["<" 1 ">"], .. …
- 20.4k
3
votes
0
answers
38
views
ExtrapolationHandler near miss
I want to use the undocumented option ExtrapolationHandler of InterpolatingFunction to set the value outside the range. Here's a toy example showing my problem. …
- 20.4k
8
votes
1
answer
191
views
Can we construct our own NDSolve`StateData?
NDSolve can be broken into three stages:
NDSolve`ProcessEquations processes the equations and sets up an NDSolve`StateData object
NDSolve`Iterate iterates the differential equations
NDSolve`ProcessS …
- 20.4k
6
votes
Accepted
Can we construct our own NDSolve`StateData?
This is a partial answer to the first two questions (what is inside an NDSolve`StateData object? can we create our own valid NDSolve`StateData object to bypass NDSolve`ProcessEquations?). It's only …
- 20.4k
6
votes
1
answer
171
views
How to vectorize this nonlinear ODE system for NDSolve?
I learned a long time ago that NDSolve can often be sped up by vectorizing systems of equations. I've got a problem now that seems ideal for this approach, but I can't get it to work efficiently. An …
- 20.4k