Questions tagged [searching]
The searching tag has no usage guidance.
117
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How to search text for a specific word? [closed]
I have a list of text where each position contains a sublist with a length of 12 elements.
I'm trying to search for a word can be appears in the first position of each sublist. The desired output is ...
- 1,335
2
votes
0
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27
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Notebook search with snippets programmatically
The normal "find" function in large notebooks hangs. I'd like to implement in-notebook find programmatically with displayed snippets of the results:
...
- 3,583
3
votes
3
answers
221
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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 ...
- 53.6k
10
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7
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746
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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 ...
- 23.8k
8
votes
5
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424
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Find sublists in a list by contents, then union them
I want to find two sublists in a list by an element they contain, and then union them, keeping them in the list.
I have this code that seems to do the job, but it seems rather clunky. Is there a ...
- 23.8k
1
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0
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77
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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 ...
- 1,410
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1
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86
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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:
...
- 51.7k
3
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1
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198
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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:
...
- 3,564
2
votes
2
answers
131
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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 ...
- 3,564
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57
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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, ...) ...
- 1,798
10
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3
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1k
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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 ...
- 53.6k
8
votes
5
answers
2k
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Find the position of a string element, knowing only part of the string
I have a list, e.g.:
list = {1, 2, 3, "Element 1", 4, 5, "Element 2", "Something else 1", "etcetera"}
Now, I want all elements starting with ...
- 23.8k
5
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3
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295
views
1
vote
2
answers
79
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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 ...
- 236k
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61
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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, ...
6
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1
answer
231
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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 ...
- 34k
15
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3
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2k
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Is there a built-in function to do binary search?
Is there a built-in function to do binary search?
Say, given a list (sorted) and a number, find the position which keeps the listed sorted when the number is inserted.
I know that ...
- 67.2k
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164
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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 ...
- 111
1
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3
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364
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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
...
- 53.6k
12
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5
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2k
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Searching a phrase in all *.nb files
I have so many *.nb files in a folder. In one of them I have written a phrase, unfortunately I cannot remember that file. I am searching about it and the file in ...
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18
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1
answer
379
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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 ...
CommunityBot
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2
votes
2
answers
70
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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 ...
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11
votes
3
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223
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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 ...
- 9,239
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2
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179
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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 ...
- 2,352
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53
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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.
...
- 125
3
votes
1
answer
38
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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 ...
- 235k
1
vote
1
answer
148
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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, ...
- 51.7k
2
votes
2
answers
114
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Finding Mnemonics for expressions with lots of indices
One of the equations I work with in my research are the pentagon equations:
...
CommunityBot
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votes
1
answer
225
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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 ...
- 14.3k
2
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3
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219
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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
...
- 51.7k
0
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1
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33
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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 ...
- 158k
12
votes
1
answer
393
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Using Mathematica to find an alternative continued fraction for $\zeta(5)$
Given the Riemann zeta function $\zeta(n)$.
I. $x=\zeta(3)$
Using Euler's continued fraction formula, we can form $\zeta(3)$'s cfrac as,
$$Ax+B = \cfrac{1}{v_1 - \cfrac{1^6}{v_2 - \cfrac{2^6}{...
CommunityBot
- 1
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80
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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 ...
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4
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1
answer
324
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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 ...
- 37.8k
6
votes
4
answers
463
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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 ...
- 543
2
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1
answer
109
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How to search for special `ResourceFunctions`
In Mathematica there exist several very useful Resource functions , for example ResourceFunction["MeanCurvature"] and ...
2
votes
1
answer
312
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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 ...
- 21
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votes
2
answers
221
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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 ...
- 15.2k
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1
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79
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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 ...
CommunityBot
- 1
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votes
1
answer
45
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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
...
- 2,335
10
votes
3
answers
957
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Extracting values with multiple keys
I want to extract sorted data from a huge database based upon two (or more) keys in a very timely manner. Here is a reproducible toy example for two keys only:
...
- 131k
8
votes
4
answers
942
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.
...
- 1,051
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1
answer
80
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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 ...
- 1,509
16
votes
2
answers
632
views
How to find a specific error message?
Is there a way to find an existing error message in the System` context, that is used for a certain case? I want to include a message in a custom function that ...
5
votes
2
answers
541
views
Implementing a Better Grep Command
In Working With String Patterns, Wolfram documentation yields a simple Grep function:
...
- 16.3k
12
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0
answers
265
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Is it possible to search the web by image from Mathematica?
Is it possible to perform a web search based on an image input?
There are several services that provide this: Google, Bing, TinEye, and maybe others. I am not sure which can be accessed ...
- 31.5k
3
votes
3
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268
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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 ...
- 23.5k
4
votes
3
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108
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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:
...
- 395k
5
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3
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204
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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 ...
2
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answers
43
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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 ...
- 471