Questions tagged [expression-construction]
The expression-construction tag has no usage guidance.
108
questions
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2
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95
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How to generate expression a + a1 e1 + a2 e2 + a12 e12 (subscripted)?
Sorry to ask this twice. I thought I could get away with just a0 + a1 e1 + a2 e2 + a3 e1 e2, but for my application I can't. I can generate a + a{1} e1 + a{2} e2 + a{12} e12 (subscripted), but that's ...
- 435
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3
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218
views
How to make RawBoxes to be Expression
expr = First@
Level[Values@
WolframLanguageData["Plot",
EntityProperty["WolframLanguageSymbol",
"DocumentationExampleInputs"]], {3}]
Plot[Sin[...
- 26.9k
1
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4
answers
369
views
How can a generate an expression like a0 + a1 e1 + a2 e2 +a3 e3 + a4 e1 e2 + a5 e1 e3 + a6 e2 e3?
I wish to input n and then generate an expression. It would look like the above when $n = 3$. I would like to use subscripts for ...
- 435
5
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3
answers
371
views
a function to extract all subexpressions from an expression
Can somebody help me with a function f such that it extract all sub expressions (i.e. looking down the expression tree) from any expression given to it and also a ...
- 9,523
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1
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80
views
1
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0
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85
views
How Defer[1+Evaluate[1+1] work?
I want to generate some expressions.
The expression is not evaluated expect some parts will evaluate first.
A simple example is
Defer[1+1+1] and in this expression ...
- 741
0
votes
1
answer
58
views
2
votes
1
answer
366
views
How to overload the operator "*" as KroneckerProduct [closed]
Can I use the expression below
a * b * c * d
for short to instead
KroneckerProduct[a,b,c,d]
automatically when a,b,c,d are ...
- 741
0
votes
1
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102
views
Solving equations with change of variables is not working?
I want to express it in the form
$$\text{expr=}\int_{-\infty}^{\infty}C_1\exp\left(-t^2\right)f(t)dt$$, i.e., the integrand is a bounded smooth function $f(t)$ times $\exp(-t^2)$ and the domain of ...
6
votes
3
answers
561
views
How to convert a string into a structured list
I am trying to use an efficient notation for the timing of sounds that i can play in Mathematica.
I would like to parse the string
"{ab{c{de}}f}"
as the list ...
- 103
0
votes
1
answer
61
views
Is it the correct syntax with TransformedDistribution?
I define a function as f[x_] := ...;which is in fact the PDF of a random variable $X$. The PDF if given by $f_X(x)$.
Let $Y$ is a random variable, which is the ...
1
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2
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548
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How to find the lowest power in multi-variable expression?
I am sorry for asking a similar question again. I asked How to find the lowest power of variable in expression? and I got a wonderful answer, but I have one more question for a multi-variable ...
- 1,820
4
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3
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1k
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How to find the lowest power of variable in expression?
If I have expression like
a1/x +a2/x^2 + a3/x^3
I want to return 1/x^3. In general case,
...
- 1,820
3
votes
2
answers
108
views
Find most general 3-tensor under given constraint?
Consider A to be a general $2\times 2\times 2$ tensor:
A = Table[ a[i,j,k], {i, 1, 2}, {j, 1, 2}, {k, 1, 2}];
pictorially one ...
- 12k
5
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1
answer
339
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How to represent 1 as Symbol["Integer"]
Maybe this is a boring question, but I cannot figure it out. Because every expression has a Head, and Head[1] is ...
- 2,571