Questions tagged [list-manipulation]
Questions on the manipulation of List objects in Mathematica, and the functions used for these manipulations.
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Apply an equation based on two sets with different indexes
Apply an equation based on two sets with different indexes
Simple example
If I have the following elements in the form of two sets with different indexes:
$m=\{m_1,m_2,m_3,m_4,m_5\}=\{1,2,2,2,1\}$
$p=\...
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How can I sort all levels except the innermost level?
How can I sort all levels except the innermost level? The number of levels is unknown. For example:
list = {{{d, c}, {b, a}}, {{4, 3}, {2, 1}}}
If we needed to ...
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Other methods extract the x-coordinates and y-coordinates from a list of multiple coordinate values and list them separately in two individual lists?
x={0.04,0.06,0.04,0.08,0.08,0.05,0.05,0.07,0.07,0.06}
y={0.25,0.4,0.22,0.54,0.51,0.34,0.36,0.46,0.42,0.4}
The two lists above represent sets of x-coordinates and y-...
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Filling the areas enclosed by two curves and calculate them
I know that there are plenty of posts on this, but I just cannot find the right one that solves my issue. The issue is that I have two datasets that I plot them using ...
- 1,309
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How to optimize performance with DeleteDuplicates?
Does anyone know how to improve this for speed performance? The code works fine, but DeleteDuplicates makes it really slow for large lists.
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Print List based on conditions
How do I print only the values of p which are all True?
In addition, is this an efficient use of a Loop in this situation or can this be improved without using a lietral for loop?
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How to speed up this code? (related to list manipulation)
This code is a program for generating a 2D roughness surface. There is no problem when the image size (m * n) is small (e.g., 50 * 50), but when it gets larger (e.g., 500 * 500), errors occur and the ...
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How can I make a list of exercises from a list of triples to write equation of the plan passing through three points?
I use proflycee to make a tex file like this
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How can I permute pair of elements in a list?
How can I find all permutations (ways of exchanging positions of pairs in brackets) in a list? The position of elements not in pair should not change.
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How to replace sequences in a list based on specific patterns?
I have this list:
list = {V1, A1, B1, A2, B2, B1 A1, V2}
I want to replace sequences like A1, B1 with ...
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Finding kernel of a set of polynomial functions [closed]
I have a list of polynomials fi[x_] and polynomial fractions qi[x_] (with i as an iterator) ...
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Defining Objects using a Table or Loop
Suppose I want to define weight[] on a list. For instance I want weight[a]:=3, weight[b]:=5, etc. I tried to do this using the ...
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Create sublists whose totals exceed a certain threshold and that are as short as possible
list = {2, 1, 8, 10, 1, 4, 4, 5, 3, 4, 4, 11, 12};
th = 10;
It is easy to create sublists whose totals don't exceed th:
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List[...] + Association[...], or Association[...] + List[...], when does the order matter?
Values of a list can be added to an association's values like so,
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