Questions tagged [order]

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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 ...
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1 vote
1 answer
57 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) <...
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2 votes
1 answer
68 views

Visualizing order of operations

TreeForm[HoldForm[ (9-2^2+10 8)/9]] produces this: Is there a way to use Divide instead of ...
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4 votes
2 answers
86 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 ...
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3 votes
1 answer
110 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 ...
6 votes
4 answers
201 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
61 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
122 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 ...
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2 votes
2 answers
169 views

How to get multiple solutions ranked in order?

I want to get 10 solutions nearest to 100, however the following code returns too small answers, how can I realize my thought? ...
1 vote
1 answer
88 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: ...
2 votes
1 answer
85 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 ...
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1 vote
2 answers
76 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 ...
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1 vote
0 answers
34 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 ...
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1 vote
1 answer
50 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]...
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4 votes
1 answer
91 views

Concise way to do lexicographic ordering

I want to order a bunch of number sequences lexicographically. Did this with ...
2 votes
1 answer
26 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 ...
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2 votes
1 answer
34 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 ...
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2 votes
2 answers
86 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 vote
0 answers
25 views

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?
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1 vote
4 answers
661 views

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 ...
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1 vote
4 answers
112 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 ...
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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 &...
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14 votes
3 answers
305 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. ...
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8 votes
2 answers
886 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 ...
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2 votes
1 answer
53 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}}. ...
7 votes
1 answer
114 views

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. ...
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8 votes
4 answers
760 views

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}, {...
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2 votes
1 answer
75 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 $...
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0 votes
1 answer
44 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 ...
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1 vote
0 answers
71 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 <...
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8 votes
2 answers
269 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 ...
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13 votes
4 answers
1k views

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 ...
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3 votes
1 answer
147 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 ...
2 votes
1 answer
2k views

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 ...
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7 votes
1 answer
212 views

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. ...
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4 votes
2 answers
160 views

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)?
0 votes
1 answer
97 views

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
183 views

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 ...
1 vote
1 answer
307 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. ...
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1 vote
1 answer
653 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 ...
4 votes
0 answers
115 views

How do I reassign the ordering of symbols in a polynomial expression?

I have a big polynomial expression, like this: ...
1 vote
3 answers
845 views

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 ...
1 vote
1 answer
95 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 vote
1 answer
184 views

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 $$\sin^8\varphi-2\lambda_i^2\sin^6\varphi+(6\lambda_i^2+\lambda_i^4)\sin^4\varphi-(4\lambda_i^2+2\lambda_i^4)\sin^2\varphi+\lambda_i^4=0$$ ...
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4 votes
3 answers
477 views

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,...
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3 votes
1 answer
282 views

ordered tree data structure

I have a map $f:X\to \mathbb{N}$ and I wish to find $x,x'\in X$ such that $f(x)=f(x')$. Since such elements are rare, I will have to check very many elements and perform many comparisons, so I suspect ...
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0 votes
1 answer
127 views

Breaking term order ties [duplicate]

I am interested in creating a table with positive Gaussian integers listed in order based on their norms, with ties broken by lex order. So far I have ...
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1 vote
0 answers
125 views

Upvalues and order of interpretation

I'm trying to use UpValues to improve the usability of some code, but I am running into an issue where the order of the UpValues is important, and I am not sure if it is my understanding or a ...
4 votes
2 answers
1k views

Permuting elements within a list

I have s = {2, 3, 5, 7, 1, 4, 6} (* always with diffente elements in {1,2....7}*) l = Length[s] n = 3 and n tells us that we ...
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3 votes
0 answers
73 views

How to simplify a polynomial and get the results in the order that I want? [duplicate]

How to simplify a polynomial in a order that I want? Assume that I have a polynomial here, for example, $a^3 b^4 c^2$, the order of symbels is the dictionary order, $a>b>c$. But what if I want ...
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