Questions tagged [expression-construction]
The expression-construction tag has no usage guidance.
108
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Elegant way to validate expression?
Suppose I'm using the expression Person[fn_String, ln_String] as a data expression, and want to prohibit the creation of expressions where ...
CommunityBot
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73
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How to exclude singularities for `NMinimize`
I have an messy expression and want to apply NMinimize to it, have no idea how to force NMinimize to ignore the singularities it ...
- 55k
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6
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Replace element of a matrix with condition
consider a matrix
$\left( \begin{array}{ccccc} 0 & 0 & 1 \\ 1 & 0 & 0 \\ 1 & 1 & 0
\\ \end{array}\right)$
How do I do a program that does these steps
1-Replace each ...
- 27.8k
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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,
...
- 165
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How to modify the order of symbols to make the result look more well and use some fixed expression 1-q, 1-c-q and so on?
In most cases, my expressions are quite complex, like the following expr and expr2. How can I make them look better, for instance, I want to use expressions like 1-q or 1-c-q and so on.
CommunityBot
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Creating a list from other lists and varying the number of elements that get added
Suppose I have
listA = {M, F}
and
ListB = {a,b,c}
I want to make a new
...
- 81.5k
3
votes
2
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167
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Precise control of fraction expression
It seems that expression for fraction differs
when the number of terms in the numerator is more than 2.
...
- 239k
2
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1
answer
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Conversion of an expression to function yields Tag Plus in ... is Protected error
I'm trying to implement polynomial interpolation. My current implementation involves generating an expression that is the final equation that will be plotted. While plotting the function itself works ...
- 69.4k
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1
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Fitting an inverse power law [closed]
Is there any reasonably fast way of finding a function of the type
that best fits a given data, for some K and n? For example, the following data closely follows an inverse power law
...
- 37.9k
0
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1
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Generating a 2 variables polynomial with constraints
I would like to generate automatically a polynomial in two variables $(s,t)$ which is symmetric under the exchange of those variables. There are three kinds of terms; at order $k$, we have
$$(s+t)^k, \...
- 53.7k
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1
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Swap Composite Command Components
Let's take a composite Mathematica command:
A[B[]]
where A and B - two arbitrary ...
- 2,444
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7
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475
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Arrange equation in normal form
Is there a way, or if not, how could one define a function which takes an equation in any form (for example as given by FullSimplify):
$$(A+X_0) x+By=3x$$
and ...
- 399k
1
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1
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Need to find a unique mathematical expression (not in documentation) that is as short as possible but takes a good amount of time to evaluate
I am writing a public ResourceFunction and I need a good clever use case that should not appear to emulate any examples in the official documentation but will ...
- 27.3k
1
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1
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How to convert this Mathematica expression to another, as described here?
I am working on a function of which the core will consist of something like:
...
- 56k