Questions tagged [searching]
The searching tag has no usage guidance.
111
questions
5
votes
3
answers
290
views
1
vote
2
answers
75
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 ...
- 321
2
votes
1
answer
80
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 ...
- 4,688
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, ...
6
votes
1
answer
220
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 ...
- 4,037
1
vote
3
answers
325
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
...
- 45
11
votes
3
answers
217
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 ...
- 31k
1
vote
2
answers
161
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 ...
- 2,342
0
votes
0
answers
52
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.
...
- 125
0
votes
0
answers
170
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 ...
- 4,187
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 ...
- 790
0
votes
1
answer
149
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 ...
1
vote
1
answer
134
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, ...
0
votes
1
answer
193
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 ...
18
votes
1
answer
370
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 ...
- 31k
2
votes
3
answers
218
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
...
- 155
0
votes
1
answer
32
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 ...
- 155
2
votes
2
answers
102
views
Finding Mnemonics for expressions with lots of indices
One of the equations I work with in my research are the pentagon equations:
...
- 1,460
4
votes
1
answer
277
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 ...
- 930
9
votes
2
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 ...
- 23.1k
2
votes
1
answer
92
views
How to search for special `ResourceFunctions`
In Mathematica there exist several very useful Resource functions , for example ResourceFunction["MeanCurvature"] and ...
- 47.2k
3
votes
2
answers
197
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 ...
- 1,583
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
...
- 2,315
0
votes
1
answer
68
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 ...
- 15k
2
votes
1
answer
304
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 ...
- 21
2
votes
2
answers
68
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 ...
- 217
7
votes
5
answers
623
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 ...
8
votes
4
answers
887
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.
...
- 193
1
vote
1
answer
79
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 ...
- 1,469
0
votes
1
answer
71
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 ...
- 275
5
votes
2
answers
523
views
Implementing a Better Grep Command
In Working With String Patterns, Wolfram documentation yields a simple Grep function:
...
- 3,095
6
votes
4
answers
433
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 ...
- 9,023
3
votes
3
answers
231
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 ...
- 1,349
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:
...
- 71
5
votes
3
answers
200
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 ...
- 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 ...
- 471
2
votes
0
answers
66
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?
- 238
4
votes
0
answers
242
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 ...
- 31k
5
votes
4
answers
544
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:-
...
- 3,574
0
votes
1
answer
48
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 ...
- 1
0
votes
1
answer
604
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 <...
- 1
5
votes
1
answer
138
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 ...
- 31k
7
votes
1
answer
155
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 ...
- 31k
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,...
- 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)
(...
- 287
4
votes
4
answers
193
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 (...
- 1,627
4
votes
0
answers
234
views
Extracting names (surname & family name) from unstructured text files
This question is about finding names of people in a text without knowing these people. There are some rules we can use to detecting names in a text
A name consist always of two or more words (...
- 2,585
6
votes
4
answers
334
views
Searching for an unordered triple in a list of triples
I have a list of triples which looks like this
T = {{7, 1, 2}, {7, 2, 3}, {7, 3, 8}, {7, 1, 6}};
(I have suppressed a few triples for clarity. My real list is ...
- 411
2
votes
2
answers
173
views
Efficient Search for reverse element in List of Lists
I have a big list AllCycles with contains lists of non-repeating integers (and the first element is always the smallest). I want a function ...
- 2,122
10
votes
1
answer
394
views
How can I implement my own documentation search function?
The current documentation search doesn't allow for very sophisticate searching, can I write my own function to search through the docs?
- 46.6k