Questions tagged [undocumented]

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

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0answers
176 views

strange timing result of LinearAlgebra`BLAS` in mathematica? [closed]

BLAS is short for "Basic Linear Algebra Subprograms". It is a famous collection of routines for doing linear algebra. I just know from Oleksandr R. that mma can directly call BLAS under the context "...
3
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1answer
210 views

Fast reading, writing of png images

One of the fastest implemented mathematica function to read png images was showed here by MarcoB The code for reading a png he proposed is: ...
3
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1answer
209 views

What is the most reliable way to find a particular function?

I learned there're built-in functions which is not documented from this question. After this , I tried looking for something which is usable for me,then noticed that with ...
3
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3answers
264 views

Accessing temporary value of a Nest evaluation

The function Nest[] must store the temporary values in the memory somewhere (those values that would form the entries of the list which is returned by the ...
3
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1answer
75 views

Using OAuthClient to extend ServiceConnect service that requires authentication and POST

I want to extend the functionality of a service available via ServiceConnect, particularly Google Calendar to insert a new event. That action requieres ...
3
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1answer
121 views

How to obtain a complete list of WordData's “Properties”?

Command WordData["Word", "Properties"] seems to return an endless list of properties, such as: "Definitions", ...
3
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1answer
64 views

Custom conversion rules in UnitConvert

I want to make UnitConvert operate on custom units with special rules. For instance, I would like to be able to convert between ...
3
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1answer
78 views

Limiting window width of Summary Box

I am creating objects in Mathematica, which I'd like to compactly display in the front end notebook as a SummaryBox. However, in many cases, the items that I wish ...
3
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1answer
72 views

What does the “AutomaticDelete” option for LibraryFunctionLoad do?

Apparently, LibraryFunctionLoad has an option "AutomaticDelete" with default setting ...
3
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1answer
53 views

How do I prepare images to be used as Appearance arguments?

So this is really in many ways a follow up to this question: Complete list of FrontEndResources For a while now I've been using FrontEndResource specified ...
3
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1answer
99 views

Implementing the Peano-Baker Series with Mathematica

I would like to calculate the Peano-Baker series with mathematica, namely an integral expansion to approximate the state transition matrix: Say I have a matrix $A(t)$ and I want to calculate: $\Phi(...
3
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0answers
43 views

How to make custom attached menubars? [duplicate]

I would like to understand how to build an attached menubar. For example, Image has the following bar - an attached cell that arises when clicked on: ...
3
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0answers
86 views

Language`ExpressionStore and ParallelMap

Is there a way to access NewExpressionStore from within a parallelized calculation? I have tried variations of ...
3
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0answers
40 views

“DistanceCombiner” option of Dendrogram – what is it?

Dendrogram has the following non-graphics options: ...
3
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0answers
89 views

Undocumented options for “BalloonEmbedding” in GraphLayout

From an error message, I see some options of the BalloonEmbedding method for GraphLayout: ...
2
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2answers
330 views

Integration with Bessel function

I know that the integration of: Integrate`InverseIntegrate[Exp[-x Cosh[t]], {t, 0, Infinity}, Assumptions -> Re[x] > 0] is: ...
2
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1answer
304 views

Normal of a triangular mesh

I know the function Region`Mesh`MeshCellNormals[], which evaluates the knot normal. I couldn't find documentation to this function which probably averages the ...
2
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1answer
68 views

Get an Attached Cell

I want to dig into what this cell is doing: It's clearly an attached cell but I can't get at it. Here's what I've tried: Cells (pretty obviously not gonna work, ...
2
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1answer
48 views

TemporalDiscretization in MethodOfLines

When solving ODE's one can use options like MaxStepFraction to control the number of grid points. When solving PDE's ...
2
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1answer
51 views

How can I find all the plot themes for a given function?

Plot themes are useful little things that ease the pain of manually styling Mathematica graphics. I have a few favorites, "Web", ...
2
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1answer
46 views

Making a header-body-footer interface without Grid and Column

I want to make a nice little interface with a header-bar, a main-body, and a footer. Grid and Column based constructs can get ...
2
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1answer
243 views

Where is NumericalMath`OptimizeExpression`

In one of my older Notebooks I found a reference to NumericalMath`OptimizeExpression. When I wrote it, I handed the result of some transformations to ...
2
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1answer
77 views

Certainty of the New Vertex Name after using EdgeContract

It appears that when I use EdgeContract on an undirected graph, the vertex that is the result of contracting an edge is always named the smaller of the two vertices....
2
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1answer
92 views

In which version was this Extract syntax introduced?

In Mathematica 10.0.1 this works: Extract[{a, b, c, d, e}, {{{1, 3}}, {{5, 4}}, {{2}}}] {{a, c}, {e, d}, {b}} In ...
2
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1answer
65 views

How can I find all of the current stylesheet notebooks?

I want to find all of the stylesheet notebooks currently open. Is there a modestly fast way to get at this?
2
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1answer
67 views

Can we control packing layouts with parameters in GraphLayout?

GraphLayout takes a complex specification including vertex, edge and packing layouts. These often have sub-options to control the details of the layout. It is ...
2
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1answer
177 views

How to understand a family of functions containing Option in System`Utilities`?

For completing this answer,I'm digging function WarpingCorrespondence with GeneralUtilities`PrintDefinitions.I found a piece ...
2
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1answer
86 views

Using TemporalData`DropTimes

I'm not able to figure out how the undocumented command TemporalData`DropTimes described here works. For example, I have ...
2
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0answers
43 views

Why does the kernel strip \< and \> from strings [duplicate]

The FE always passes strings to the kernel that look like: "\"\<asdasd\>\"" And the \< and > get pruned out. We can simulate this for ourselves with: <...
2
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0answers
33 views

Create a ProcessObject for a process not made with StartProcess

I am launching and linking to Mathematica from an external process and would like to be able to create a ProcessObject for the launching process that will support <...
2
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0answers
313 views

What are the default parameters for ADAM optimizer?

ADAM Optimizer (used for optimizing the loss function for neural networks) consists of 3 free parameters: $\eta$, stepsize/learning rate $\beta_1$, forgetting factor for gradients $\beta_2$, ...
2
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0answers
101 views

Where is URLExistsQ in version 11?

Searching this function in the doc,it found nothing. Is this function be removed? I want to check weather the url can access from my country. ...
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0answers
81 views

What does the “ScalingFunctions” Method suboption of Graphics do?

Some plotting functions produce a Graphics with a "ScalingFunctions" suboption within the ...
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0answers
85 views

Internal`LocalizedBlock doesn't support Protected symbols and emits weird messages

Protect[x]; Internal`LocalizedBlock[{x[0]}, x[0] = 1; x[0]] ...
2
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0answers
132 views

What does System`Private`GetContentCode do? [closed]

I just came across this strange function. It is next to GetRefCount and functions like HasDownCodeQ, so it may be something ...
2
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0answers
57 views

How would you rewrite these procedurally coded internal routines in functional form?

I came across the following two internal functions SimplifyDump`AbsToSign and SimplifyDump`SignToAbs that have been written ...
2
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0answers
85 views

Where can I find tutorials or examples about Internal` packages and other useful packages? [duplicate]

As an intermediate level Mathematica user, I consider one of the greatest barrier on my way to a higher level of programming is the lack of knowledge about extra packages like Internal` package or ...
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1answer
94 views

What does the return value of Internal`ArgumentCountRegistry mean?

Internal`ArgumentCountRegistry sometimes will give a value about some function.Such as ...
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1answer
89 views

Problem with “MediaTools`” in Mathematica 12

I asked here for a solution how single video images can be extracted very fast from avi files. Piotr Wendykier gave a solution for Mathematica 11.3. Now I'm using Mathematica 12 and his solution ...
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1answer
90 views

Quadratic LineElement. How does it differ from linear LineElement?

This is a general question about quadratic LineElement. It does not appear to be documented or have examples of its use. What is it ? Does it have 1 or 2 dimensions ? Are there any examples of its ...
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1answer
116 views

What does Charting`$MajorTickLength do?

I know I can specify tick lengths using the Ticks option in Plot and related functions, and I also know about the CustomTicks ...
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1answer
52 views

How can I determine how an Import/Export format works?

Questions abound on the MSE about how to get a certain import / export feature to work as desired. For instance, here's one that popped up recently: How can I standardize the coordinate origin for ...
1
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1answer
36 views

Second return value of StyleDefinitions in NotebookInformation

I recently found the wonderful "StyleDefinitions" return value from NotebookInformation which I've been using to edit style ...
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0answers
56 views

Understanding how ComponentMeasurements finds neighbors

I am trying to understand how the module ComponentMeasurements in Mathematica works when the property Neighbors is called in ...
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0answers
62 views

What can we do with the Dump contexts? [closed]

So we know from here what the *Dump contexts signify and here Rojo found a very useful goody that involves them: ...
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0answers
51 views

What are all the returns from FrontEnd`NeedCurrentFrontEndSymbolsPacket

So Mr. Wizard points out here that we can get all the FE packets via FrontEndExecute[FrontEnd`NeedCurrentFrontEndSymbolsPacket[]][[1,1,4]] I was wondering what all ...
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0answers
356 views

Uploading sketch to Arduino from Mathematica

Since the device drivers for Arduino used by DeviceExecute have very poor performance for writing and receiving serial data to/from Arduino compared with the device ...
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0answers
51 views

Documentation for undocumented symbols RandomMatrix and SharingList?

In version 10.2, there are symbols Random`RandomMatrix and System`SharingList. I tried some experiments of my own, but could ...
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0answers
59 views

Understanding HoldSequence and ReleaseHoldSequence in Error Handling

I was playing with GeneralUtilities`PrintDefinitions in V10.1, and find some of native Mathematica functions using ...
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0answers
164 views

Does Graphics`Mesh`SimplePolygonQ[] work for you?

Graphics`Mesh`SimplePolygonQ is an undocumented function. I'm using Mathematica 7, and when I try: ...