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Questions tagged [subscript]

The tag has no usage guidance.

1
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1answer
39 views

Function definition with sub (super) cripted variables [duplicate]

I like using subscripts a lot. However, it is regrettably not possible to do, for example: myfunction[Subscript[x,1]_] := Subscript[x,1] +1 where instead of the ...
1
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0answers
30 views

Typography of Mixed Tensor Index Notation

How can one properly and quickly write a mixed "tensor" such as $\Gamma{}_{1}{}^{2}{}_{3}$? Shortcuts such as esc Gamma esc, Ctrl+^, Ctrl+_ are prefered. I intendd to use this in an inline equation ...
1
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1answer
68 views

Problem displaying Killing equations

What I'm trying to do is to compute the Killing equations and then solve them using DSolve to determine their solutions. I have a problem understanding where my Mathematica program doesn't work ...
5
votes
1answer
170 views

How to save/load (export/import) symbolized variables?

I have a large number of variables/functions with subscripts and use definitions with memoization to avoid recomputing them within a kernel session, but I cannot figure out how to export them all for ...
1
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1answer
47 views

How to treat Subscript objects as constants when using D

I want to define a constant vector {$k_x , k_y , k_z$}. The problem is that Mathematica gives me D[$k_x$,x]$=k_1$. I want this to be zero, because $k_x$ is a constant. Clearly D[$k_x$,x]$=k_1$ makes ...
1
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2answers
88 views

I want to set $x = \{x_1, x_2, \cdots, x_n\}$

I want to get $\{x_1, x_2, \cdots, x_n\}$. I want to use the $x_i$ as a variable. The following code did't work. ...
3
votes
1answer
26 views

Symbolic ticks with subscript - ListPlot

Is it possible to rename ticks with a name like this: "$0.125 \, V_{FS}$"? In the below code I wrote "$0.125 \, V$", I don't know how can I insert the subscript. ...
0
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1answer
37 views

Forcing nice positions of summation Σ 's under and overscript in FractionBox

Apologies if this has been asked before. The expression ...
2
votes
1answer
35 views

List all subscripts in an expression

Say we have the following expression: $r_{1,3} r_{1,2}^3 m^2-r_{1}r_{4,2,1}$ (Sorry I had to use TeX, read as Mathematica input notation) I need a function that lists all the subscripts of $r$. ...
2
votes
1answer
42 views

Replacing product of powers of subscripted symbol

I have an expression that involves subscripts, powers and products, for example: $3(m-1)^2 \alpha_{a,b}^c \alpha_{d,e} + n \alpha_{f,g}^h$ (Sorry, I had to use TeX, but read it as mathematica input ...
0
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1answer
70 views

Automatic variable naming

I am trying to construct a complicated code in which I need to name a lot of variables and their definitions. For Example: The problem is as follow: Once I insert new variable in between two, I ...
0
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1answer
34 views
1
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0answers
62 views

How to define a variable with a subscripted part

I have looked around, but found no real answer for this. I generally use Mathematica for thermodynamics and electromechanical equations and for this, to keep a good overview, i got used to defining ...
1
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0answers
32 views

Formatting ChartLabels in BarChart. More than one subscript letter appear non-italic

I want to plot a BarChart with quantities some of which are named with one subscript letter and some with two. The quantities with one subscript letter appear ...
5
votes
2answers
196 views

Unexpected interpretation of a variable with subscripts

I am new to Mathematica and encounter the following problem. Define two variables g = 1 and Subscript[g, 1]= 1. If we execute $...
0
votes
1answer
90 views

Writing fractions in Graphics

I want to write a fraction which contains subscript in a graph. But my code doesn't work. ...
0
votes
1answer
111 views

How do I get Mathematica to invert a matrix with subscripts involved? (Subscript usage)

I want Mathematica to invert a matrix in which all variables are symbolic including Subscript. Now I am guessing this has something to do with the method I'm ...
0
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0answers
49 views

Displaying subscripted variables in GUIKit

I'm trying to build a custom interface using Mathematica and I want to write something inside a textfield with a subscript, however, when I run the GUI, I see boxes on the places where there should be ...
1
vote
1answer
97 views

How to define the scope of subscript in a iteration?

Newbee to MMA, and completely have no clue about it. I need do a calculation of some iteration, seen in the picture below. $n=3,4,5,..., \begin{cases} L_n=c_n\\ L_{n-1}=c_{n-1}\\ L_{n-p+1}=\...
2
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0answers
88 views

ParametricPlot and ParametricPlot3D crash with subscript notation

Bug introduced in 11.0 and persisting through 11.2 In all previous versions of Mathematica, the following works perfectly well: ...
2
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0answers
1k views

“neither a list of replacement rules nor a valid dispatch table, and so cannot be used for replacing” - NDSolver Problem [closed]

I'm currently working on a simulation of n linked pendulums and I'm using the Euler-Lagrange Equations to solve the problem. As I compile this error appears several times: "ReplaceAll: {{}[[1,1]]} is ...
0
votes
1answer
50 views

Using Subscripted Notation without Introducing new identifier

I would like to use subscripted notation such as $\sigma_x$ as identifiers for use as variables. In this example I am using the Pauli Matrices so that I would use notation such as: $$ \sigma_x = \{\{...
1
vote
1answer
62 views

Asymmetry in Solve (probably because of subscripts)

I am trying to solve this equation for $R$ and $R_Y$. The equation seems symmetrical in terms of $R$ and $R_Y$. I don't understand why it solves fine for $R_Y$, but can't for $R$. If I replace $R_Y$ ...
4
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3answers
114 views

How to pull out negative signs through subscripted variables while displaying output in traditional form?

I am trying to get an expression to display correctly in TraditionalForm, with the negative sign in front of other symbols: ...
3
votes
2answers
191 views

assign 2 letters in a subscript

Suppose I want to solve an equation for the matrix elements of $\bar{W}$: $$\alpha W_{ba}+\beta W_{bb}=x; \alpha W_{aa}+\beta W_{ab}=y$$ Using the syntax ...
0
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1answer
90 views

Why are scripts not allowed as components of vectors?

In Mathematica, I attempted to construct an arbitrary vector $\vec{a}$ using the Subscript: ...
1
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2answers
144 views

Compensate for the different values between 0 and 1 in this equation

I want a work program to compensate for the different values between 0 and 1 in this equation and show results ...
0
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2answers
1k views

The partial derivative symbol with subscript - what does it mean and how do I type it?

The guide that I am using to study Mathematica tells me to type the following to get I am stuck at the partial derivative symbol because I do not understand what it exactly means with the ...
3
votes
1answer
264 views

How to “clear” the downvalues of a subscripted variable?

I have a function that sets certain subscripts of the symbol aa as in the following example: ...
1
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0answers
71 views

$μ_t$ becomes SubscriptBox[\[Mu], t]

I was using variables like $μ_t$ in my local Mathematica notebook. But when I opened that notebook in Mathematica Online everything got converted to something like SubscriptBox[[Mu], t]. How can ...
4
votes
1answer
128 views

Does using subscripted variables decrease the performance of Mathematica?

I tried integrating two equation with the same structure, the first equation fails to evaluate completely - the answer is still in terms of integration. The second integration evaluated fine. The only ...
1
vote
1answer
74 views

How to sort subscripts of symbols in an expression?

For example, I want to change expr1 into expr2. I am pretty sure I can do this using nested loops to find and then modify terms with subscripts, but that is clunky, old school thinking. Is there a ...
1
vote
1answer
131 views

Making subscripts with variable

How do I make a variable $k_{1x}$ where the $x$ is just a label to denote the magnitude along the x-axis and not an actual defined variable x in the code? Similarly, if I wanted to make $E_x$ or $E_{...
1
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0answers
105 views

Smart Subscript

I have a question about subscript policy. For some reason I have some variables called Subscript[q, 1], Subscript[q, 2], ...
10
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5answers
449 views

Remove subscript from string

I have a list that I am using for the legend of a plot gases = {"Air", "He", "Ar", "\!\(\*SubscriptBox[\(N\), \(2\)]\)", "\!\(\*SubscriptBox[\(CO\), \(2\)]\)"}; ...
2
votes
1answer
65 views

How can I append a subscript? [closed]

In a symbolic computation I might get a symbol b to be a subscripted variable with n subscripts; for example ...
2
votes
1answer
110 views

How to set a symbol indirectly?

I have a symbol, say x, whose calculated value is a 2nd symbol. How can I set the 2nd symbol to a given value? For example, say the value of x is one of the symbols a, b, or c. If it is a, I want to ...
3
votes
2answers
392 views

Mathematica can't differentiate when variable name has subscript component

I am not pasting my input code here since the website modifies my code. Instead I am attaching a screenshot of my notebook. Issue: I enter two separate commands (asking Mathematica to differentiate ...
3
votes
2answers
107 views

How do I convert Subscript[a, 1] Subscript[e, 1] into Subscript[a, 1] Subscript[f, 1]?

I have a series expression like x = a0 + a1 e1 + a2 e2 + a3 e1 e2 and I wish to convert all instances of e1 into f1. The series is subscripted. If there are no subscripts, then the following answer ...
4
votes
4answers
771 views

Subscripted (or superscripted) variables in Mathematica

When I first learned of Mathematica and started to use it, I soon discovered that Mathematica supported subscripted and superscripted variables such as $M_{i j}$. Naively, I first thought that I ...
1
vote
1answer
126 views

Problems with Subsuperscript and Subscript Combination [closed]

I have a 3D figure, not important what it is, and I have the following code for the Z axis of this figure: ...
5
votes
1answer
190 views

An alternative to subscripts?

Are there any good alternatives to using subscripts to keep track of and uniquely identify many variables? I know that subscripted variables behave badly. Thanks!
0
votes
1answer
72 views

Overriding Subscript operator creates its own variables?

I tried to override the Subscript operator to make matrix indexing a bit more "user-friendly" in complex expressions with the following code according to the ...
3
votes
3answers
193 views

Simplification behaviour of subscript expression: is this correct?

Why does the code (Mathematica version 10.0.2.0, Linux x86-64): Subscript[Subscript[S,i],j] Subscript[Subscript[S,i],j] // Simplify output the expression: $(...
2
votes
0answers
83 views

Subscript vs. Brackets [duplicate]

I'm used to using Ctr+_ to create indexes for variables (which evaluates to something like Subscript[a,i,j]), but on this site I ...
1
vote
1answer
288 views

Converting the subscript of matrix name to a variable

I want to change indices of matrix name during loop for creating different matrices. For example; ...
3
votes
1answer
188 views

What role to sub/superscripts play in Mathematica?

I'm not sure I understand the role of subscripts and superscripts in the Mathematica language. For me, the expression: ...
0
votes
1answer
106 views

Using subscripted symbols in functions

Using subscripts would significantly improve the structure of my code. Until now I used the following two lines to implement this. ...
1
vote
0answers
447 views

Defining a function with a subscripted head

How can I define a function with subscript? Forexample: f_alpha[x] = 2*x
1
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0answers
125 views

Subscripts in variable names: Bug?

In the following plot, one of the two functions {-par, par} defined by ...