All Questions
Tagged with built-in-functions or built-in-symbols
246 questions
1
vote
1
answer
243
views
Having trouble defining a function with head Superscript
I wish to define a function in the following form,
...
- 113
6
votes
1
answer
93
views
Unexpected result of Clip
A simple question. Here Clip works as documented:
Clip[0.5, {0, 0}, {0,1}]
(* 1 *)
Values larger than 0 are replaced with ...
- 10.2k
27
votes
2
answers
2k
views
List of symbols without built-in meaning
Is there a list of all symbols with special display forms but no built-in meaning? That is, operators that are described in the tutorial Operators without Built-in Meanings?
- 132k
4
votes
1
answer
158
views
Internal function overload when calling ReadString on a fresh kernel
Problem description:
I am capturing all FE messages to redirect them to my own window while blocking them from showing in the evaluation notebook using this method by rcollyer. It works great, but I ...
- 4,225
35
votes
3
answers
3k
views
Why is Plus so much slower than Total?
Why is Plus so much slower than Total for summing lists?
...
- 864
5
votes
0
answers
64
views
Why ReadList ignores NullRecords for Number?
When thinking on this recent question the immediately obvious solution which came to my mind was to use ReadList with options ...
- 62.3k
5
votes
1
answer
242
views
Changing operator precedence
Is there a way to change operator precedence for built-in symbols?
I'd like \[TensorProduct] (which I redefine to ...
- 6,697
27
votes
4
answers
1k
views
What's purpose of the new function BinarySerialize?
11.1 introduced a new function BinarySerialize, but I don't know what it can do better than the traditional method.Its behavior is very similar to ...
- 27.2k
1
vote
0
answers
96
views
Controlling precision/accuracy inside built-in commands
Some functions (such as Erf) appear to use NIntegrate internally. In such cases, is there a way to control such options of ...
- 855
5
votes
2
answers
353
views
NetModel's cache in which folder?
NetModel will produce a big cache file after you use it first time.
...
- 27.2k
1
vote
0
answers
87
views
How to run the command 'Distribute' on large product of multivariable polynomials without simplifying it
I am new to Mathematica, so pardon if question is trivial. I am trying to expand (i.e multiply out the factors) an polynomial expression $d$, with many factors, obtained as a result of taking ...
4
votes
1
answer
105
views
What is the point of ActiveClassification?
I must be missing something here - it seems that the first argument to ActiveClassification is your target function, but if you already know that function then why ...
- 3,830
3
votes
1
answer
121
views
What does the return value of Internal`ArgumentCountRegistry mean?
Internal`ArgumentCountRegistry sometimes will give a value about some function.Such as
...
- 27.2k
0
votes
0
answers
59
views
built-in functions with one argument
I want to find the (NumericFunction) built-in functions that take exactly one document.
...
- 4,894
1
vote
1
answer
109
views
Unexpected behavior of ForAll
Resolve[ForAll[n,Element[n,Integers],!IntegerQ[Sqrt[n^2-7 n-1]]]]
True
But as I know,when the n is $17$,...
- 27.2k
5
votes
1
answer
91
views
Inverse of CharacterName [duplicate]
Is there an inverse function to CharacterName? For example, CharacterName["ε"] gives ...
user45739
1
vote
0
answers
62
views
How to convert `LogTicks[0, 2][[1, 2]]` to a regular number
I want to convert the $10^i$ tick labels generated by LogTicks of the CustomTicks package to regular numbers. The first tick ...
- 3,891
2
votes
0
answers
118
views
Built-in functions for Homotopy group
Does Mathematica have built-in functions for Homotopy group, for example for computing
$$\pi_n(S^m)=?$$
or more generally
$n$-th homotopy group,
$$\pi_n(X)=?$$
for some $X$.
(I search, but I could ...
- 923
2
votes
1
answer
386
views
Tag protected error for Grad despite using Unprotect[Grad]? [duplicate]
I've defined an upvalue grade[k,m], where k is an integer and m is a matrix, and have defined a number of overrides for this type in the normal Mathematica namespace (...
- 6,488
4
votes
0
answers
102
views
Use of ContainsAny in EntityClass
The documentation page for EntityClass states that
Property values in implicitly defined entity classes may make use of Quantity (and intervals of Quantity) for ...
- 518
9
votes
1
answer
263
views
What's the purpose of the GeneralUtilities`UnpackOptions?
?? GeneralUtilities`UnpackOptions
...
- 27.2k
4
votes
1
answer
188
views
5
votes
1
answer
145
views
What is the purpose of MatchLocalNameQ?
I found a kernel function which is undocument MatchLocalNameQ.But I don't know the purpose of it.
...
- 27.2k
5
votes
2
answers
288
views
How to find all function which cannot be ToExpression?
If you use ToExpression directly like this
ToExpression /@ Names["*`*"]
You will get a chunk error information.I try to ...
- 27.2k
7
votes
2
answers
311
views
Timeline overview of implemented Mathematica functions
With
WolframLanguageData[{"ListLogPlot", "Plot", "ColorNegate"}, "Timeline"]
one gets information at what time and version a certain function was implemented:
...
- 11.8k
5
votes
1
answer
199
views
What is the purpose of GraphComputation`MeshGraph?
When I use GeneralUtilities`PrintDefinitions to print its definition,I will get this information:
So I think this function can convert a ...
- 27.2k
5
votes
1
answer
107
views
Unexpected behavior of ComplexityFunction
As far as I know, the complexity must be a positive value. But I get such example:
...
- 27.2k
0
votes
0
answers
75
views
Is it possible to define a new built-in function in Mathematica? [duplicate]
Say I want to define a function to do integration by part, is it possible to define it as a new built-in function in Mathematica, so that I don't need to define it every time I want to use it?
- 455
-1
votes
2
answers
71
views
4
votes
3
answers
228
views
How do I type the independence symbol in Mathematica?
I know this seems to be a really stupid question, but I can't find a way to type the independent symbol. I found how to write the \[UpTee] but it isn't the same. ...
- 159
2
votes
1
answer
638
views
Define Tilde as a postfix operator
I have read a lot of posts in this forum on defining infix symbols like CircleDot and Tilde. The Help pages say ...
- 445
6
votes
1
answer
267
views
How to judge the function is kernel function or not in program method?
I found the behavoir have changed. All symbol in System` is kernel funtion(include those your custom funtion)
...
- 27.2k
12
votes
1
answer
300
views
Why isn't Orderless an Attribute of And?
In standard logic And is a commutative operator. Still, in Mathematica, And doesn't have the ...
- 1,289
2
votes
1
answer
59
views
Understanding the behaviour of CrossingDetect on lists
Consider the first example in the documentation of CrossingDetect:
CrossingDetect[{4, 0, 1, -2, 1, -2, -3, -1, 3}] // Normal
...
- 14.5k
2
votes
0
answers
68
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 ...
- 19.8k
1
vote
1
answer
152
views
`Plus` wrongly applies `OneIdentity` to eradicate itself in `Plus[Power[_, 2] ..]`, unreproducible
I was trying to match some polynomials, but this is weird:
...
- 5,779
6
votes
2
answers
231
views
How do I make Conjugate behave more consistently?
Sometimes Conjugate distributes. Sometimes it doesn't. Look:
...
- 19.8k
12
votes
3
answers
610
views
How to create a Graph of Mathematica Commands of the installed version
I always wonder how many inbuilt functions does Mathematica have (of course you can google for it) and how they are connected with each other! So I tried this (v10.1).
...
- 16k
3
votes
1
answer
120
views
How to replace the symbol n in DifferenceRoot
I'd like to employ another symbol (say alpha or k) instead of n in the following (type of) ...
- 2,385
5
votes
2
answers
287
views
How to get a list of all the image processing functions in Mathematica 10.4
Could someone kindly guide me as to how to get all the image processing functions (segmentation, analysis, morphological operations etc... ) for 2D and 3D images in Mathematica including ones that do ...
- 9,060
1
vote
1
answer
110
views
Unexpected behavior of DiscretizeGraphics
As this code,we can visualize the "Test text"
Graphics[Text[Style["Test text",20],{0,0}],Axes->True,AxesOrigin->{0,0}]
I try to use <...
- 27.2k
13
votes
4
answers
3k
views
Capital Letters that are built-in symbols
I'm trying to search for an answer to "What is the complete list of single capital letters that represent built-in Mathematica commands, symbols, or uses?"
For example:
C, D, E, I, N, O
Is this ...
- 15k
6
votes
1
answer
388
views
How to use the built-in function GraphElementData
Very surprise to me.I found this is a built-in function but it is undocumented.Such as this answer's "CurvedArc" and "Curvature",...
- 27.2k
3
votes
0
answers
68
views
How to understand the LocalClusteringCoefficient use in directed graph? [duplicate]
When this function use in undirected graphs,its action is normally and can be explained by this formula
$$CC_v=\frac{n}{C_{k}^{2}}=\frac{2n}{k(k-1)}$$
n is adjacent nodes of $v$'s number of ...
- 27.2k
9
votes
1
answer
326
views
A unexpected behaviour of RelationGraph
$Version
"10.4.1 for Microsoft Windows (64-bit) (April 11, 2016)"
I want to match the based point of VoronoiMesh(...
- 27.2k
10
votes
1
answer
205
views
What is ExpectationE and what does it do?
I just found the symbol ExpectationE with autocomplete.
Rendered the symbol is
Searching the documentation and the internet leads to nothing. Does somebody know ...
- 273
8
votes
2
answers
265
views
Can I put Association brackets <| … |> in an autocompletion template?
I have a function f which takes as one of its arguments an Association object, and I would like to produce a nice usage message ...
- 10.3k
2
votes
1
answer
2k
views
How to list all functions in a package? [duplicate]
I got a package which can be loaded in MMA. The manual for the package does not give demonstrations of all functions/commands. Hoe can i find all the commands in the package?
- 23
2
votes
1
answer
88
views
Mathematica built-in function that translates number strings to numbers
I recently ran across a function in mathematica that translates "twenty-two" to 22, but I can not remember what it is and my searching through the help functions has yielded nothing. Can anybody help?
- 4,715
5
votes
2
answers
179
views
A unexpected behavior in RelationGraph
Bug introduced in 10.2 and fixed in 11.0.1
Firstly we get these idiom
...
- 27.2k