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Best way to search for Wolfram Language documentation and answers?

I just found this custom Google search engine I made 8 years ago to search through Wolfram Language Documentation, Mathematica StackExchange, MathGroup, and Wolfram Community. I was surprised to find ...
dan7geo's user avatar
  • 1,410
0 votes
1 answer
85 views

Binary algorithm for finding the range of elements

Consider a sorted list of real numbers listz and some boolean condition condition that involves these numbers: ...
John Taylor's user avatar
  • 5,407
3 votes
1 answer
196 views

How to find a unimodular integer matrix $T$ satisfying $T^\top A T=B$ given symmetric integer matrices $A,B$?

Given two unimodular symmetric integer matrices $A$ and $B$, I asked how to find a unimodular integer $T$ that satisfies this nonlinear relation between $T$ and $A,B$ like this in Mathematica: ...
zeta's user avatar
  • 251
1 vote
0 answers
56 views

How to search for content in all my Mathematica files, or in the opened ones?

I have one file where I used the package 'ReactionKinetics' but I forgot where. Does Mathematica allow for searches in all Mathematica files, or in the opened ones, like certain editors (Winedt, ...) ...
florin's user avatar
  • 1,798
5 votes
3 answers
295 views

Solving the Covering Salesman Problem in Mathematica

Say I have a weighted graph ...
Tomi's user avatar
  • 4,366
1 vote
2 answers
78 views

How do I find the "edge" values/positions in a list?

I have a list of values and am interested in finding the contiguous region above a certain threshold. I have gotten this far,but cannot seem to find the correct way to find the edges. Note: It is not ...
Indiana's user avatar
  • 331
2 votes
2 answers
126 views

Enter special character in search box

Usually, I just enter special characters with the Esc key and hence am not familiar with their real code in plain text. But this seems troublesome in the search box ...
xiaohuamao's user avatar
  • 4,708
0 votes
0 answers
61 views

What strategy would you adopt for this deep search on a function?

Ok, so I have a problem where I have a function that depends on 9 parameters and a bound condition $$f(x,y,z,w,t,u,v,r,s)<K$$ Now all these variables take discrete values such as: $$x \in \{x_1, ...
Granger Obliviate's user avatar
6 votes
1 answer
231 views

Documentation Search : google-like (pokygon -> polygon)

If you search for "pokygon" in google.com, then google automatically fix error, and searches for "polygon". Like google.com, if you search for "pokygon" in mathematica (V ...
imida k's user avatar
  • 3,935
1 vote
3 answers
352 views

How to find the nearest string to another string in a mixed array

I am trying to find which string is nearest to another string in an array of numbers and strings. For example, say I have an array that is as follows ...
Jam's user avatar
  • 45
11 votes
3 answers
222 views

Faster searching for subsets with pairwise conditions

I am looking for a faster way of finding large subsets of lists that obey pairwise conditions. In particular, I'm looking for a large (over 10k) set of quaternary words (i.e. ordered lists) of length ...
M.R.'s user avatar
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1 vote
2 answers
174 views

How to search a directory of nb files for a string?

I would like to find a particular string in a set of nb files in a directory but am having problems interpreting the results of my code. Here's a simple example: In directory d:\mathematica, I have ...
josh's user avatar
  • 2,332
0 votes
0 answers
53 views

How to search exact product title with ServiceExecute

I am trying to find the exact product title having phrase "HEPA filter bags" on "amazon.com" but it doesn't return the correct result. ...
Anh's user avatar
  • 125
0 votes
0 answers
189 views

Finding minimum in a list of lists

Imagine I have the following list {{0, {2,3}}, {-1, {5,3}}, {2, {2,6}}, {5, {5,0}}, {0, {1,1}}, {-2, {10,2}}, {3, {4,2}}}; I want to pick the element in the list ...
sam wolfe's user avatar
  • 4,553
3 votes
1 answer
38 views

Position doesn't work for custom symbol within package

In a notebook, I can easily search an expression for a custom symbol. In[237]:= Position[{mySym, 1, 2}, mySym] Out[237]= {{1}} However, if I write a function and ...
RobertNathaniel's user avatar
0 votes
1 answer
163 views

Implementing an optimization algorithm in WL

I am trying to implement the Jaya optimization algorithm (Jaya). This is a flowchart from the Author 's webpage showing the details of the Algorithm. Note that there is a typo in the equation in the ...
Mahamed Omran's user avatar
1 vote
1 answer
147 views

Pattern Matching in 2-dimensional lists

How would I search for all the elements in a nested list which contain values at specific index? For example, I want to search for and return all the elements in a (n,2) list which begin with a 3 ({3, ...
JJJJJJJJJJJJJJJJ's user avatar
0 votes
1 answer
217 views

Import structure from Matlab into Mathematica 12 and nested lookup

I use Matlab and generate data that I save in a structure in a MAT file. I want the results to be loaded into Mathematica, as several analysis and plots are best when done in the latter than in the ...
Marcos GO's user avatar
18 votes
1 answer
378 views

Intelligent text search on large directories of notebooks?

I have a (deeply nested) directory containing 10s of thousands of wolfram files (mostly notebooks (nbs), but also scripts (.wls), packages (.m, .q wl), my and wxf data) and many subfolders each with a ...
M.R.'s user avatar
  • 31.4k
2 votes
3 answers
219 views

Cases do not pick up Sqrt?

I'm trying to understand how Cases work in Mathematica, and I'm a bit curios why i't wont pick up the Sqrt function? Consider the following expressions ...
Mikael Fremling's user avatar
0 votes
1 answer
33 views

Search for terms contatining error functions

question might have an answer in this post (Efficient Search for specific Terms in symbolic Expression) but i don't understand how to convert it to my specific case Through some definite integrals I ...
Mikael Fremling's user avatar
2 votes
2 answers
114 views

Finding Mnemonics for expressions with lots of indices

One of the equations I work with in my research are the pentagon equations: ...
Gert's user avatar
  • 1,480
4 votes
1 answer
321 views

Find words in a messed up table [duplicate]

This table with a caption that said "First three words you see will come to you in 2021" inspired me to do some digging: Imagine that we have a table with randomly filled letters. How can ...
polfosol's user avatar
  • 952
10 votes
3 answers
1k views

Solving a rotating combination lock puzzle

The following puzzle appears in The House of da Vinci II and I thought it might be interesting to tackle in Mathematica: There are numbers marked on four rotating cylinders. These numbers must add up ...
flinty's user avatar
  • 24.8k
2 votes
1 answer
106 views

How to search for special `ResourceFunctions`

In Mathematica there exist several very useful Resource functions , for example ResourceFunction["MeanCurvature"] and ...
Ulrich Neumann's user avatar
3 votes
2 answers
220 views

Find position of sublists containing a given element at nth position

I have a list of lists similar to this: L = {{"a", "b", "c"}, {"x", "c", "y"}, {"i", "j", "h"}, {"x", "b", "z"}} Each list within ...
TumbiSapichu's user avatar
  • 1,603
0 votes
1 answer
45 views

Find parameter value for which sharply-peaked constrained 3d-integral equals 1

I want to find the value (desirably to high-precision) of the parameter $i$ for which the constrained 3d integration ...
Paul B. Slater's user avatar
0 votes
1 answer
80 views

Searching across multiple notebooks for given list of functions / symbols

Is there a method to search across multiple notebooks for each in a given list of function or symbol name? The input should be a list of function or defined symbols, and the output would be an ...
alancalvitti's user avatar
  • 15.1k
2 votes
1 answer
311 views

Search for squares

Could anyone please help me find $a\left(x,y,z\right)$, $b_{i}\left(x,y,x\right),$$c_{i}\left(x,y,z\right)$ and $d\left(x,y,z\right)$ that are sums of squares of polynomials or rational functions such ...
Dan K.'s user avatar
  • 21
2 votes
2 answers
69 views

How to find the primitive Heron triangles with three rational angle-bisectors by MMA?

I'd like to find the primitive Heron triangles with three rational angle-bisectors. In a Chinese book, I saw these primitive Heron triangles with three sides no longer than 1000, but I'm not sure if ...
D.Matthew's user avatar
  • 217
10 votes
7 answers
738 views

How to find the position of the smaller element in the list?

x = {4, 1, 2, 5, 6, 7} y = {1, 2, 4, 5, 6, 9} There are two lists x and y. How to find out these positions of the elements in list x are smaller than those in ...
A little mouse on the pampas's user avatar
8 votes
4 answers
937 views

Find elements of array with largest absolute value

I am wondering how to do in Mathematica the following: Given as an input a large array, I want to output a list of top $n$ entries with largest absolute value + their location within the array. ...
Tomáš Bzdušek's user avatar
1 vote
1 answer
80 views

How to test if $ⅈ$ is in an expression?

From this answer https://mathematica.stackexchange.com/a/9773/68791 and according to the documentation: FreeQ[list,form] test whether form occurs nowhere in ...
Sylvain Leroux's user avatar
0 votes
1 answer
78 views

Search for certain entries in an expression

I have a list with large expressions. I would like to find certain functions and their derivatives by searching the list. The search outcome should be the functions/derivatives found only, not the ...
Bran's user avatar
  • 275
5 votes
2 answers
539 views

Implementing a Better Grep Command

In Working With String Patterns, Wolfram documentation yields a simple Grep function: ...
George's user avatar
  • 3,145
6 votes
4 answers
460 views

How to search within notebooks on Windows 10?

I have a lot of notebooks scattered in my downloads, documents and desktop folder. I have all the required locations on Windows indexing options but if I look at Advanced Options and File Types and nb ...
user13892's user avatar
  • 9,293
3 votes
3 answers
261 views

Find element in a list matching a pattern (using wildcards)

Somehow, I did not manage to find anything related to that. Suppose, in my Global list of variables, I would like to make a search such that I obtain all the ...
Patrick.B's user avatar
  • 1,399
4 votes
3 answers
108 views

Subsequence Search

I need to parse some xml code. I need to extract some values withing pattern elements. I made an example of my trouble. Here is some complicated xml list: ...
VasilySH's user avatar
5 votes
3 answers
203 views

Find non-case sensitive string in a mixed list of elements?

Consider an example list with mixed element types, e.g.: list = { 1.234 , a[2] , {"Abc" , 4/5} , "acb" }; I would like to have a function that finds the position ...
Kagaratsch's user avatar
  • 11.9k
2 votes
0 answers
43 views

Match an expression that has a descendant pattern

I have a complicated expression in which I have another expression p which, when it’s present, I want to match the outer expression and all of its children. I was hoping for something like ...
LBushkin's user avatar
  • 471
2 votes
0 answers
70 views

Is there a way to cancel a search in Mathematica?

Is there a way to cancel a word search in Mathematica initiated via the Find and Replace menu?
Steven Clark's user avatar
4 votes
0 answers
246 views

Approximate Nearest Neighbors in Mathematica?

Is there any support for Approximate Nearest Neighbors (ANN) in Mathematica or third-party packages? I'm looking for a good implementation of locality sensitive hashing for applications where ...
M.R.'s user avatar
  • 31.4k
5 votes
4 answers
553 views

Find permutation index

Firstly I wanted to find all the non-negative integer solutions for the following equation given the value of $k_{max}$ $$ k_1 +k_2 +k_3+k_4 = k_{max} $$ For this I use the following code:- ...
Hubble07's user avatar
  • 3,614
0 votes
1 answer
49 views

Problem using Position when using a variable [closed]

So, I tried to use Position to get the Position of the 90% Maximum of a Photodiode Signal. The code works when i directly use the solution of the .9*Max[...] solution, but I want to have it with a ...
SBoles's user avatar
  • 1
0 votes
1 answer
636 views

Using the binary search algorithm in a sorted grid

I want to get a mathematica code for binary search algorithm applied to a sorted grid containing integers. For example, given f[k_,x_]= x^2 + k x + k - 2 where <...
Ik John's user avatar
5 votes
1 answer
139 views

How to speed up a text search widget?

I have an InputField that searches a predefined list for matching strings and displays them in a TextGrid. But when the list is ...
M.R.'s user avatar
  • 31.4k
7 votes
1 answer
159 views

How to cache results of WebImageSearch?

Every call to WebImageSearch costs money (wolfram service credits), thus, I would like to page through results without having to redownload them. Given the ...
M.R.'s user avatar
  • 31.4k
0 votes
2 answers
57 views

Looking for specific data in .txt file

I've the following code: Import["test.txt"] And it gives me: 1,10 2,20 3,30 4,40 5,50 6,60 7,70 8,80 9,90 10,100 11,110 12,120 13,130 14,140 15,...
Looper's user avatar
  • 287
0 votes
1 answer
36 views

Searching in a .txt file for a specific time

I've the following code: Import["hoi1.txt"] And it gives me: "(time,voltage,current,power) (1,10,5,10*5) (2,20,6,20*6) (3,30,7,30*7) (4,40,8,40*8) (...
Looper's user avatar
  • 287
4 votes
4 answers
198 views

How can one efficiently find the (x,y) values of the rectangles that enclose a chosen % of nonrandom data points in mathematica?

A half hour of searching for answers did not give useful results. This is typical data: I need to find the (x,y) values of at least 6 rectangles with one corner at (0,0) and the opposite corner at (...
Michael B. Heaney's user avatar