Mathematica symbols are the ultimate atoms of symbolic data. Every symbol has a unique name, exists in a certain Mathematica context or namespace, and can have a variety of types of values and attributes.

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3
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3answers
190 views

How to identify all rules that match pattern type? [duplicate]

I would like to be extend the below solution to be able to find get all rules from the list step[2] that match the generic pattern k_Digit_p. Where k and p are not ...
13
votes
2answers
308 views

Why does leaving and re-entering a context lose values defined in that context?

I'm getting unexpected behavior when beginning a new context, leaving it, and then re-entering it. Specifically, when re-entering the context, symbols that had been previously defined in that context ...
1
vote
1answer
41 views

Finding parameters for which a function/symbol is defined

Suppose I have a symbol/function defined pointwise like in f[1, 5] = 3 f[3] = 7 f[2, 3.4] = 8 By executing ?f I can see the ...
0
votes
0answers
45 views

in the part assignment is not a symbol, create different matrices with a “Do” loop [duplicate]

Im trying to assemble new matrices from some previous matrices I have created, but I can´t. What Im trying to do is the following: 1) I have different matrices: ...
5
votes
1answer
77 views

How to get all the symbols `x` for which `f[x]` is defined?

Assume that definitions like the following are in place: ...
1
vote
1answer
46 views

Replace symbols in output without evaluation

I found the Wolfram example for ExpandNCM but I want a more human-readable output form. I want to evaluate ExpandNCM, for example with ...
0
votes
0answers
36 views

Symbol-handling, force-replace instanced variables within functions! [duplicate]

Currently I am stuck with the issue of renaming an instanced variable like r1$23314 to a global one. This issue arises as I need to use a "localizeAll" Module in ...
4
votes
1answer
64 views

? (Definition) versus ?? (Information)

What is the difference between ? Definition and ?? ...
0
votes
2answers
50 views

in the part assignment is not a symbol, create different matrices with a loop

Im trying to assemble new matrices from some previous matrices I have created, but I can´t. What Im trying to do is the following: 1) I have different matrices: ...
3
votes
1answer
81 views

Using packages with symbols that have the same name

Let us suppose we have two packages: A and B. ...
1
vote
3answers
158 views

How can I make a summary of all the commands of Mathematica?

I would like to have a simple way to get summary information about all the many commands built into Mathematica. How could I do this? Is there a site I may refer to?
9
votes
1answer
316 views

How can I replace the Greek symbols in an expression with their plain text names?

Suppose I have an expression with Greek symbols in it. How would I convert that expression to another expression where the Greek symbols have been replaces with their names in plain text? I've ...
1
vote
0answers
60 views

Can I get a symbol cross-reference of a Mathematica Notebook?

Is there a way to get a cross reference listing for a notebook or set of notebooks?
1
vote
3answers
123 views

SymbolicC Simplified Displayed

How might I display a simplified SymbolicC below. For example in the following example ...
5
votes
1answer
322 views

Why Mathematica chooses bracket for function arguments over parenthesis?

This is a non-technical question. I'm just curious that why Mathematica breaks the convention that parenthesis are widely used for function arguments. What's the advantage for ...
5
votes
1answer
162 views

TeXForm and Symbolize

I would like to use TeXForm to generate latex output as usual. Howeve, I use subscripted variables such as c_t. Unfortunately, when using symbolize in the notations package for this end, TeXForm does ...
0
votes
0answers
74 views

Piecewise functions Integration with symbol

I want to integrate one piecewise functions as following, ...
4
votes
0answers
147 views

Organizing Wolfram language symbols with Entity

Here's a word cloud tally of the ~5k System names split at camel humps, with the long tail cropped. What resources are available to organize these terms using the new ...
0
votes
1answer
54 views

Symbolic Expectation Operator [closed]

Is there anyway to write the symbolic expectations operator $\mathbb{E}$ in mathematica? I tried ExpectationsE, but its not quite. Thanks!
13
votes
2answers
2k views

Which Mathematica function has the longest name (by character length?)

I came across DamerauLevenshteinDistance[u,v] in the documentation center so that got me thinking: Which documented Mathematica function has the longest name? ...
0
votes
0answers
59 views

Usage of @ symbol in Mathematica [duplicate]

What is the purpose of @ symbol? Also, I would appreciate if somebody could provide a webpage where such functional special symbols are documented
0
votes
1answer
24 views

Numeric-type attributes for symbols (analog of NumericFunction)

Is there an attribute for symbols that makes NumericQ give True? For example Pi and ...
2
votes
1answer
99 views

Equivalent command to the Maple indets command

This carries on the discussion here and here. I had mistaken Variable[] to give you ALL variables in an expression, but apparently, it is not meant for that. ...
0
votes
1answer
102 views

About Symbolize and Variables

I do believe this sort of similar questions had been asked many times, so I have read a LOT. For example this and this as well as many other related posts. But a glance at what my main question is ...
1
vote
1answer
110 views

Symbolize Subscript doesn't work

I want Mathematica to interpret subscripted variables as symbols. I found documentation suggesting the Notation package could do this, but if I do: ...
4
votes
1answer
113 views

Is undocumented \.bd = ½ bad to use?

I want to use \.bd which leads to ½ as part of the name of a symbol in the front end (e.g. ...
3
votes
0answers
63 views

How to get Symbol[“x”]=3 to work [duplicate]

This is probably a really simple one, but I'm stumped. I want Symbol["x"]=3 to work just like x=3. However I can't figure out ...
13
votes
1answer
317 views

Is garbage collection broken in version 10.0.0?

Bug introduced in 10.0.0 and fixed in 10.0.1 In version 10.0.0 under Windows I am observing the following behavior: ...
2
votes
0answers
48 views

Is there any way to get Times displayed as $\cdot, *,$ or $\times$ in output form? [duplicate]

In the output of Mathematica, operators $\cdot$ or * or $\times$ are usally displayed as space; e.g., $x * y$ becomes $x \, y$ in output. Is there any option that can be set to make "space" becomes ...
2
votes
0answers
94 views

Displaying subscripted symbols with TraditionalForm

I have pasted this code in from Mathematica 10 ...
7
votes
1answer
148 views

How to convert \[Formal…] symbols to standard ones in an expression?

Mathematica generates an expression sometimes using \[Formal] symbols. This is causing a problem with the TeXForm code generated ...
2
votes
3answers
241 views

How to create a writable and clearable symbol? [duplicate]

I'm trying to create several symbols and assign values to them. Here's what currently appears to work: Evaluate[Symbol["fdds" <> ToString[10]]] = 1 But ...
3
votes
1answer
88 views

Symbolic Output after numerical computation

I have a small question about the symbolic output. I started to write a program that generates the coordinates of n-dimensional polytopes by Wythoff construction. For crystallographic groups, all is ...
2
votes
1answer
61 views

How to joint symbolic expressions together [duplicate]

I want to joint symbolic expressions together to create a another symbolic expressions. one way to do that is as follows: ...
2
votes
1answer
168 views

Some Characters From Custom Font Do Not Show Up

I'm using version 8.0.4.0 on a Mac, and recently made my own .otf and .ttf fonts at PaintFont.com. The font can be based on pretty much anything, including handwriting, and covers everything from ...
2
votes
1answer
429 views

What's the difference between variables with and without a subscript?

If I input $x = a + b$, the $x$, $a$ and $b$ are blue. When I hit Shif+Enter, the $x$ turns black, indicating the kernel now knows this variable. But when I input $x_r = a + b$, and hit Shift+Enter, ...
0
votes
1answer
67 views

Optimizing repeated function calls

Easiest way to keep my library nice, is to naively call some functions many times with same parameters. Doing so prevents from zoo of (library-)global variables and complicated initialisation ...
1
vote
1answer
115 views

Unevaluated symbols [duplicate]

I often find it useful to define a symbol from strings (often in a loop in which I define other symbols). This I accomplish with Symbol (and often ...
0
votes
1answer
157 views

Append subscript to variable name [duplicate]

I'm importing equations from Word document and transforming them into input form. But subscripts look ugly. Is is possible to programmatically append subscript to variable name? e.g. ...
3
votes
2answers
252 views

Replace every Minus to Plus in Expression

Thought this is a rather simple thing, but I was not able to find a solution: I have a polynomial expression like: expr1=a^2-b+c*d expr2=a-b expr3=-a+b-c and ...
0
votes
1answer
59 views

Why won't Manipulate work with symbols generated by Symbol?

Suppose I am provided with two data lists. (Assume for the moment that they are lists of integers.) I would like a function that generates bar charts that I can manipulate. Here is what I have: ...
1
vote
0answers
95 views

Auto-complete for user defined functions [duplicate]

If I define a symbol in Mathematica, it doesn't show up in the autocomplete list that works for symbols in System. Test code: ...
16
votes
4answers
353 views

Result about Context is inconsistent with the description of “Power Programming with Mathematica”

x = 5; temp`x = 6; Begin["temp`"] {x, Global`x, temp`x} The result in my Mathematica session is {5,5,6}, but it's ...
3
votes
2answers
165 views

Stopping a head from evaluating more than once

While attempting to answer my own question, Is there a way to "hold" prefix / infix / postfix notation?, I came across the need to evaluate a recursive function only one level deep. For ...
26
votes
1answer
451 views

Are greek symbols causing different evaluation?

I've updated today to Mathematica 9.0.1.0 from version 8 and found something that absolutely confuses me. Let us define a piecewise function: ...
0
votes
0answers
41 views

Explicit multiplication * sign in Mathematica [duplicate]

I need to turn my Mathematica output (in string form) to a form that I then need to feed to Maple, and specifically I'd need all multiplications to be marked by * (as opposed to x or, as it happens ...
2
votes
3answers
94 views

Assigning symbolic operators to built-in functions

Can I do something like this: $$\partial_t = D[f, t]$$ i.e. create a symbol instead of a function so that each time I call it, it executes the operation as defined?
8
votes
1answer
260 views

Defining my own invisible operator

There are some invisible operators in Mathematica (\[ImplicitPlus],\[InvisibleTimes],...
3
votes
1answer
168 views

Dynamic generation of Buttons

The Project I am trying to dynamically turn on/off the display of data for a circos-esque plot that I generated. The Code I have data stored in mfData and a ...
3
votes
2answers
146 views

How to open directly the help/reference window from a notebook

I'm used to do ??symbol when I want the reference for a given symbol, then I click on the >> arrows to open the help window. Would it be possible to ...