Questions tagged [order]
The order tag has no usage guidance.
59
questions
6
votes
7
answers
603
views
Dropping disordered numbers in a list
I have a list of numbers like
l1 = (1,2,3,4,8) and clearly, l1 is in order (next number is greater than previous number).
Well, ...
- 405
1
vote
3
answers
116
views
Is it possible to prevent two functions from commuting?
I have an expression of the following type:
x f[a] g[b]
where x is a number but f[a] and <...
- 691
2
votes
2
answers
88
views
How is the output (a list) of the "Eigenvalues" function ordered?
The documentation of the function Eigenvalues says that the Eigenvalues are sorted in order of decreasing absolute values. But what is if the absolute values are the same. For example when two ...
- 35
4
votes
3
answers
355
views
How to replace the element in list of list by its ordering index
I have a list of list: res={{9, 1, 5}, {3, 6, 12}}
I want to change it to res={{5, 1, 3}, {2, 4, 6}}
by following their ordering ...
- 95
3
votes
3
answers
360
views
Check ordered subset in list
I need to find a function that checks if a list is contained in a larger list RESPECTING the order of the smaller one. For example check[{a,b,c},{a,d,b,c}] would ...
- 259
3
votes
4
answers
220
views
Finding relative ordering of two lists
Suppose you have two lists A and B which are related by a permutation, and have no repeated elements.
Is there a simple and ...
2
votes
0
answers
80
views
How to improve the efficiency of NIntegrate on complicated functions?
When solving a problem by Matlab and Mathematica both, I find the speed of NIntegrate are far less than dblquad when calling ...
- 133
1
vote
1
answer
83
views
KSetPartitions function with fixed points
I'm trying to develop a function that computes some numerators for scattering amplitudes and I need to generate a collection of tree diagrams that contain a set of particles (effectively numbers) <...
- 259
2
votes
1
answer
83
views
Visualizing order of operations
TreeForm[HoldForm[ (9-2^2+10 8)/9]]
produces this:
Is there a way to use Divide instead of ...
- 478
4
votes
2
answers
105
views
Tuples which treats re-ordering as equivalent [duplicate]
I would like to define a new function myTuples, that behaves just like Tuples, except that it treats, as with ...
- 1,359
3
votes
1
answer
150
views
Re-sorting higher-order ordinary differential equations
I have some higher-order ordinary differential equations.
Firstly, I want to collect the terms with common factors together. Besides, I want to re-sort the ODE with the highest order term first.
How ...
- 367
6
votes
4
answers
221
views
How to order the coordinates generated by ToBoundaryMesh counterclockwise?
The following code works for polygons. A square 4x4 is tried here:
...
0
votes
1
answer
88
views
Double Sum, taking a constant out of the first sum gives a different result
I have a code with the following double sum:
Sum[Sum[(-1-k+f[k]) (-l+n+f[l]), {l,k+1,n}], {k,1,n}] /. f[r_] -> If[r == 1, n, 0]
With that, I get:
I wanted to ...
3
votes
1
answer
126
views
reorder 2-d list according to the second value of each element
I have a nested list with n row and 2 column, its values are numbers, Can I change the order of elements according to the second value?? so every element have in its second value the same value in the ...
- 73
1
vote
1
answer
191
views
Find Order of a Differential Equation (ODE or PDE)
In Mathematica, I need a code in order to find the order of ODEs and PDEs.
Here are some examples using different notations:
For fifth-order ODE:
...
- 367
2
votes
1
answer
99
views
How to get neighbor lists in the same order/orientation from a periodic IGTriangularLattice[] graph?
Using IGraphM, I want to get the VertexComponent[] neighbors around all nodes, in a periodic IGTriangularLattice[] graph. To do ...
- 1,593
1
vote
2
answers
92
views
Rearrange a matrix with new Table Headings-List
I have used a procedure to rearrange my data in a more appropriate way for data analysis such that more similar elements lie next to each other and dissimilar ones far apart.
Let's say I have a 5x5 ...
- 53
1
vote
0
answers
39
views
Yet Another Expression Ordering Question (not polynomial but transcendental)
Forcing a particular ordering of terms, i.e. overriding Mathematica's, is a recurrent issue, especially for users working within particular domains where there is a particular ordering tradition or ...
- 2,560
1
vote
1
answer
52
views
l,r-operations on words $[[[1,2],3],4] \cdots, n]$, $[1,[2,[3,\cdots, [n-1,n]\cdots ]]]$
Suppose I have a word $\{1,2\}$, then $l(\{1,2\}) = \{[1,2]\} = \{1,2\} - \{2,1\}:=12-21$ and for the word with length $3$, (I will omit bracket), the $l$-operation is defined as $
l(1,2,3) = [[1,2],3]...
- 803
4
votes
1
answer
129
views
Concise way to do lexicographic ordering
I want to order a bunch of number sequences lexicographically. Did this with
...
- 1,874
2
votes
1
answer
28
views
ordered set inclusion 2
Slightly change the previous question, ordered set inclusion,
Now, consider $A=\{2,3\}$ and $B=\{2,3,4,5\}, C=\{5,2,4,3\}$, Now I want to make element $\{2,3\}$ is in $B$ as well as $C$, what can be ...
- 803
2
votes
1
answer
42
views
ordered set inclusion
Suppose I have a ordered set $A=\{2,3\}$ and $B=\{2,3,4\}$ and $C=\{2,4,3\}$.
Is there any mathematica command whether $A\subset B$ gives true(or 1) but $A$ which is not a subset of $C$ gives false(or ...
- 803
2
votes
2
answers
134
views
How to reorder {x,y} list data and plot as ListLinePlot
How to re-arrange data to find line plot in order (I tried with given below code).
...
- 1,055
1
vote
0
answers
26
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Consistency of sample quantile to population quantile for discrete variables [closed]
Can I know if the sample quantile converges to the population quantile in probability for discrete variables?
If we use Hoeffding (1963)'s results, is this true?
- 39
1
vote
4
answers
1k
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How would we extract elements of a list greater than a certain value? [closed]
Say we have a list
{35,210,67,950,32,365}
how would we extract all the elements greater than 100 from this list (using a function)? The desired output would be ...
user74971
1
vote
4
answers
120
views
Sorting a function
So I have a function f[x : {{_, _} ...}] := f /@ x; f[a_,b_]=:a+b. I can input f[{1,2},{2,0},{3,4}] and get ...
user74971
2
votes
0
answers
52
views
Map Inverse Ordering on Matrix [duplicate]
I have an matrix (symmetric, but any $n \times n$ will do)
$$A = \begin{bmatrix}
0 & 4.5 & 6 & 5.5 \\
4.5 & 0 & 4 & 3 \\
6 & 4 & 0 & 5 \\
5.5 & 3 & 5 &...
- 63
14
votes
3
answers
379
views
Ordering Problem With VoronoiMesh
Imagine I want to model 2D cells moving in a tissue. Consider, as an example, Lloyd's relaxation algorithm. Using VoronoiMesh I'm able to mimic some cell movement. ...
- 4,179
8
votes
2
answers
1k
views
Best way to insert element into an ordered list at the correct position?
Suppose I have an ordered list orderedList and I want to write some code that will involve regularly inserting new elements into ...
- 854
2
votes
1
answer
64
views
Does Mathematica have an order relationship for lists, or a general ordering relation?
{1, 2} < {3, 4} doesn't seem to work, but Sort[{{3, 4}, {1, 2}}] yields {{1, 2}, {3, 4}}. ...
- 872
7
votes
1
answer
164
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Ascending and descending in the context of the order of operations on Datasets
I did not understand the concepts ascending and descending in the context of the order of operations on Datasets. It is listed in the documentation, on Dataset's page and yet I did not understand. ...
- 257
8
votes
4
answers
1k
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SortBy first element then second element, and so on?
SortBy can sort list by first element easily like so:
SortBy[{{1, 6}, {1, 2, 8}, {2}}, First]
and the result is:
{{1, 6}, {...
- 589
2
votes
1
answer
109
views
Inverse of matrix up to some order
Let $A(t,s)$ be a matrix of any size (potentially large), whose entries are polynomials functions wrt $(t,s)$ of order $N$.
I would like to compute the inverse $X$ of $A$ up to the order $N$ that is
$...
- 592
0
votes
1
answer
46
views
Order of evaluation of variable
I'd like to control the order of evaluation in a multi-variable function.
Example: Suppose I have the function:
B[x_, y_] := x + y/x;
If I try to evaluate ...
user68265
1
vote
0
answers
73
views
Dealing with positive power variables in Taylor expansion and assumptions
I would like to compute the Taylor expansion of monomials whose powers are nonnegative rational variables.
First, here is a function which encodes the multivariate Taylor expansion at the points <...
- 592
8
votes
2
answers
280
views
How does Query decide the order in which the functions are applied?
First of all I know that Query is a nice way to organize your functions that are applying at specific levels of an expression. But I don't understand the order in ...
- 9,113
13
votes
4
answers
1k
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ListPlot join points by nearest neighbor rather than order
I have found some software that allows me to "data mine" the values from publication figures. I have a bunch of contours from papers that I've mined using this software, and am having some trouble ...
- 395
3
votes
1
answer
166
views
Symbol Order for Built-in Functions such as TrigReduce
I’d like to use the TrigReduce function on a sum of n sinusoids to any power, and am running into an issue with Mathematica’s default ordering of symbols. Is there a way that I can specify an order ...
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2
votes
1
answer
3k
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What is "standard" or "canonical" order? [duplicate]
When trying to sort a list of fractions and quadratic numbers I'm trying to work out why sort orders the quadratics after the fractions. It seems to use the function "OrderedQ" and "standard order" or ...
- 1,348
7
votes
1
answer
256
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Cross product without reordering (noncommutative)
Not related to question
I assume this question (as it is of very general structure) might have been asked before, unfortunately I did not find an answer to it - despite what I used as search queries. ...
- 842
4
votes
2
answers
176
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Cyclically Flat Functions
Any idea how to define some operator ° such that e.g. $((a°b)°c)°d=a°(b°(c°d))=a°b°c°d=b°c°d°a$ (but $a°b\neq{b°a}$ in general)? So ° is Flat plus (insert here)?
- 1,011
0
votes
1
answer
131
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how to order a parameter by power?
for example, y=a x^2+ a(b x^2)+c^3 x^2+z^2+c z
how to tansfer function y to formart like y=?x^2+ ?x+? and y=?z^2+?z+?
So, I want to tansfer the equation below to arrange both A_{2l} and A_{2h} (one ...
0
votes
0
answers
207
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The order of evaluations with nested slots [duplicate]
I tried to join a series of evaluations with nested slots as follows:
#^2 & /@ #^2 & /@ Range[10]
However, the results were somewhat different from what ...
- 341
1
vote
1
answer
418
views
Ordering of monomial terms
I have monomials with variables $a_1,\, a_2,\,\dots$ also their complex conjugates. I found that their order within the monomial depends on at which point I set the overline for the complex conjugate. ...
- 21
1
vote
1
answer
846
views
Variable order in output
I have two questions about editing my output in Mathematica.
I want the variables to be to the right of the fractions with the parameters.
Update
...
- 21
4
votes
0
answers
120
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How do I reassign the ordering of symbols in a polynomial expression?
I have a big polynomial expression, like this:
...
- 41
1
vote
3
answers
888
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Matching the order of a master list of lists from a random list of lists
Using Mathematica 9, I have 2 lists of lists one master with dimensions {300, 6}. The second is some random order but has the same first ...
- 4,478
1
vote
1
answer
97
views
Sorting the words of a phrase by defined variables/associations
Is it possible to change the word order of a phrase by creating a list of possible values/variables and using the Sort function?
I want a specific word order always. $(a>b>c>d)$ But the ...
1
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1
answer
213
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Is the output to Solve ordered or are the solutions randomly placed?
I am trying to find the roots of a polynomial of eight degree
$$\sin^8\varphi-2\lambda_i^2\sin^6\varphi+(6\lambda_i^2+\lambda_i^4)\sin^4\varphi-(4\lambda_i^2+2\lambda_i^4)\sin^2\varphi+\lambda_i^4=0$$
...
- 1,265
4
votes
3
answers
514
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Change Contour Plot Overlap Ordering
I have a contour plot for which I have selected a finite set of contours. However, the contours overlap in some places and I would like to reverse the order in which they are drawn.
In other words,...
- 1,153