Questions tagged [string-manipulation]
Questions on the manipulation of String objects in Mathematica, and the functions used for these manipulations.
1,283
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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
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0
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28
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Coverting .nb file code content to string type using NotebookImport
For my work I need to import the notebook and get all the contents from the code cell. For this task I chose ...
2
votes
1
answer
45
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Intra-Symbolic Wild Card Pattern Matching
I have the following custom expression structure I am parsing:
Theorema`Knowledge`Q$TM[
Theorema`Language`VAR$[Theorema`Knowledge`VAR$x$TM]]
I already was able to ...
3
votes
4
answers
167
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Sort Column as a Row
I have
a = {1, 2, 3, 10};
b= {2, 3, 4, 8};
t= Do[If[a[[i]]+b[[i]]>3,Print[a[[i]]],"No"],{i,1,4}];
2
3
10
I need to get the result; t={2,3,10}
- 107
6
votes
2
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246
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Replace number in string with ? and /;
I am trying to make the following:
StringReplace[{"A4", "A#3"}, {"A" ~~ x_ -> "B" ~~ x}]
This should replace ...
- 5,329
3
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0
answers
55
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How to improve Burrows-Wheeler Transform performance?
I have implemented the Burrows-Wheeler Transform as below:
...
- 25.3k
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42
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How to convert LaTeX to expression without interpreting variables as products?
I need to convert some LaTeX code to mathematica expressions. So far I have used
ToExpression["ab", TeXForm]
yielding ...
- 268
1
vote
1
answer
41
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Why is StringSplit dropping empty entries? [closed]
I am parsing a CSV and whenever the trailing records are empty:
StringSplit[",2,,4,,",","]
I get:
{"2&...
- 9,385
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131
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Butterflied Strings Shortest Character Solution
The shortest character solution for Butterflied Strings on Wolfram Challenges according to the CODE CHARACTERS functionality is 40. I have a solution with 42 ...
- 151
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1
answer
47
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Pattern matching with DeleteCases
I'm using Mathematica 14.0 and I'm having a pattern match problem with DeleteCases. The example below illustrates the problem. I define a test string followed by two patterns that both nominally match ...
- 1
3
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2
answers
99
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Writing Mathematica code for putting in commutation relations in a string
I am trying to write a mathematica code to accomplish the following:
For a given $n$, consider $(ab)^n$, which is a string of the form $\underbrace{ababab...ab}_{n\text{ times}}$.
I want to replace $...
- 133
1
vote
1
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58
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Compressing a file's name string
I was working with files where each name records a lot of information about what is in its respective file and wanted to compress it a little bit. So I wanted to change it's 'base'.
And I noticed that ...
- 18
2
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3
answers
225
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The problem of matching consecutive cross-line strings
I have a file named "s0.log",There's a lot of this structure in there:
You can see that the strings "Alpha occ.eigenvalues --" and "Alpha virt.eigenvalues --" will be ...
- 1,562
1
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0
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62
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Why is SequencePosition or SequenceCases so slow on large lists?
I observed that SequencePosition or Sequence Cases on a list of around 60'000 digits is so slow that I had to sort out to string pattern matching.
Is this normal behavior or should Wolfram have a look ...
- 121
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4
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263
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3
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1
answer
115
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Behaviour of `ToExpression` inside a function definition
I want to create a function that takes in an array of unknown size and do some index operations on it. I am using strings to construct the expression and then trying to use ...
3
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5
answers
136
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Sorting logic and generation of letter sequence
In the context of experimental designs, it is common to generate the various treatment names to build the factorial design table.
The table of the 2^2 design reads :
For the 2^3, the table reads :
...
- 612
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1
answer
59
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FromLetterNumber and "" bug or intended behaviour
DigitQ behaviour appears consistent
"" is treated as 0 by DigitQ`
...
1
vote
1
answer
57
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Difficulty using StringCases to obtain desired substring
I have extracted and stored some plaintext strings (derived from a pdfs) from the web that I wish to search for various values following certain text substrings that are different for different ...
- 1,883
2
votes
1
answer
67
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RawBoxes in ClickToCopy adding spaces after escaped characters
I'd like to use ClickToCopy to display a matrix equation, and have its TeX form be copyable. I started with something like
...
- 260
3
votes
3
answers
251
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From string to number
I have data such as,
{{[Part(33.0, 34.0), Part(33.0, 34.0), Part(31.0, 32.0), Part(30.0, 32.0), Part(29.0, 32.0), Part(28.0, 29.0), Part(28.0, 29.0)]}}
as text ...
- 321
1
vote
1
answer
83
views
Nicer display of output with TeXForm
I am summing some terms by first transforming it to TeXForm.
Example:
Sum[TeXForm[x^i],{i,1,50}]
I want to break the line in ...
- 1,836
1
vote
0
answers
30
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Change specific elements of a list [closed]
I have currently looking to change specific elements of a list.
I saw that you can apply a fonction to an element if you know it's position as shown in this question : Apply function to specific ...
1
vote
0
answers
27
views
Can I limit the mouse prompt position in InputField? [duplicate]
I wrote the Manipulate code in double quotation marks in InputField.
Manipulate[str, Style[Control@{str, " "}, 20]]
Above, I can create a prompt status ...
- 1,688
4
votes
2
answers
611
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Largest integer between 1 and 1000 with no letter "n"
This problem is easy to solve logically - try it for fun if you want before you run the code and see the answer.
...
- 73.1k
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1
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70
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How do I copy what I enter into 'InputField' without any computational processing?
I made an InputField where I input the quoted sentences inside.
And I set InputField to copy every time I run it.
...
- 1,688
2
votes
0
answers
69
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DigitQ, LetterQ, UpperCaseQ, LowerCaseQ on empty string
Is this a bug or I am missing something?
#[""] & /@ {DigitQ, LetterQ, UpperCaseQ, LowerCaseQ}
...
- 16.7k
10
votes
8
answers
462
views
Element by element concatenation of two string lists
I have two lists of strings:
month = {january, february, march}
year = {2013, 2013, 2013}
I want to concatenante these element by element with the final result of ...
- 151
3
votes
3
answers
87
views
Convert a string with $N^2$ entries to a rank-$N$ matrix
Suppose we are given a set of numeral data like a string that consists of $N^2$ entries, say $N$ is very large (here $N=8$ for simplicity, but $N$ can be $10^8$...)
...
- 251
3
votes
1
answer
88
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Problems that occur when converting to PDF files using NotebookPrint
I made a string expressed in StandardForm format.
...
- 1,688
3
votes
2
answers
176
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Select a subset in the bit-strings with even 1s overlapped - thank you
Model 1
Consider the permutation list of 4-bit-strings:
list = Permutations[{0, 0, 1, 1}, {4}]
which outputs:
{{0, 0, 1, 1}, {0, 1, 0, 1}, {0, 1, 1, 0}, {1, 0, 0, ...
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votes
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222
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How to execute a String code in the form of StandardForm?
How to execute a String code in the form of StandardForm?
I want to get execution results for strings of various forms. For this, I used ToExpression.
...
- 1,688
3
votes
1
answer
178
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How to convert the string "A^0" into the expression Superscript[A,0]?
I'm looking for a procedural way to define a symbol for a variable, based on a string. For instance, ToExpression["A^B"] gives us ...
- 612
1
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1
answer
74
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Two Subscript/Superscript questions
In mathematica code, I have a table of quantities that involve subscripts and superscripts. I need to put short text titles in the first row of the table. Suppose I have index1="A", index2=&...
- 435
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1
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56
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Exact rules applied by StringReplace when two substrings are to be replaced?
I am interested in the case when we apply StringReplace to a string searching for two substrings where one is contained in the other and we define different ...
- 320
3
votes
5
answers
420
views
Convert integer to words of specific length
Assume we give the value from 1 to 26 to alphabets a,b,...,z.
Now given an integer ($n$) i like to generate words of specific length ($l$) that sum of them equals $n$. For instance, if
$n=10$, $l=3$;
<...
- 838
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vote
3
answers
566
views
Can colors be included in strings?
Colors are displayed in output like squares of the corresponding color. Say, if input is Blue, the output will be a blue square.
I would like to use this in a ...
- 2,066
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4
answers
134
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1
vote
0
answers
103
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Convert a string of Python expression into Mathematica expression within Mathematica
While there are many ways to convert a Mathematica expression into other Languages, I was wondering if there is something reverse for Python. There are some discussions in Python groups, but I am ...
- 1,836
1
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1
answer
51
views
How do I select a long part of a complicated expression between two symbols inserted for the purpose? [duplicate]
I want to select a long expression that spills over into many pages. Using mouse and cursor makes it go really fast. Is there a way I can insert some characters and instruct Mathematica to pick up ...
- 1,678
0
votes
1
answer
78
views
How to select a long part of a complicated expression between two symbols inserted for the purpose? [closed]
I want to select a long expression that spills over into many pages. Using mouse and cursor makes it go really fast. Is there a way I can insert some characters and instruct Mathematica to pick up ...
- 1,678
2
votes
2
answers
182
views
How to declare a string as unescaped after storing in a variable?
Continuing from my previous question, this issue is an extension of it.
This issue is somewhat similar to how-do-i-make-a-string-literal-without-having-to-escape-backslashes? but not entirely the same,...
- 2,029
1
vote
2
answers
98
views
Can you recover the original vectors that, when summed together, achieved a particular criteria
I am wondering if it is possible to take the binary strings of length $3$ (tuples) whose sums have weight $2$ (i.e they have $2$ non-zero entries)(binary case, meaning they have two $1$'s entries) $$u ...
- 501
8
votes
8
answers
642
views
String containing characters in the same order as other string
How can I write a function that checks whether the characters in the first string are in the same order as in the second string?
Examples:
...
- 4,833
2
votes
1
answer
36
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StringReplace with Style will cause another character in the string [duplicate]
StringReplace["abbaabbaa", "ab" -> "X"] will output XbaXbaa, but ...
- 567
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votes
3
answers
131
views
Space cannot be used in vertical string with unicode character
To reproduce the issue, use Ctrl+Enter to create 3 placeholders and enter 你 好 (or ...
- 567
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votes
4
answers
253
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Move variables to one side of equation
I have a bunch of linear equations of the form
x[1] == 5012 - 5x[3] - 2x[4] + 5x[7]
etc. Specifically there is one linear variable on the left, and the right-hand ...
- 175
0
votes
2
answers
113
views
How to automatically convert sub- super-indices to strings?
Consider the following expression:
expr = "\!\(\*SubscriptBox[\(m\), \(t\)]\)"
I would like to convert it to the ordinary string e.g. ...
- 5,733
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5
answers
268
views
2
votes
2
answers
121
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How can we replace strings according to requirements?
In a text, we need to replace whitenode with yellownode only when the character 'a' appears within the last pair of {} in each ...
- 2,029