Questions tagged [string-manipulation]
Questions on the manipulation of String objects in Mathematica, and the functions used for these manipulations.
1,261
questions
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votes
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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.
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0
votes
1
answer
63
views
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.
...
- 1,460
1
vote
0
answers
57
views
DigitQ, LetterQ, UpperCaseQ, LowerCaseQ on empty string
Is this a bug or I am missing something?
#[""] & /@ {DigitQ, LetterQ, UpperCaseQ, LowerCaseQ}
...
- 9,693
10
votes
8
answers
447
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
2
votes
3
answers
77
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 $10^8$...)
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- 21
3
votes
1
answer
81
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Problems that occur when converting to PDF files using NotebookPrint
I made a string expressed in StandardForm format.
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- 1,460
3
votes
2
answers
174
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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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4
votes
1
answer
209
views
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.
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- 1,460
3
votes
1
answer
164
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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 ...
- 560
1
vote
1
answer
64
views
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=&...
- 425
0
votes
1
answer
50
views
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
414
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
1
vote
3
answers
562
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 ...
- 1,874
2
votes
4
answers
132
views
1
vote
0
answers
81
views
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 ...
- 1,604
1
vote
1
answer
50
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 ...
- 1,648
0
votes
1
answer
77
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 ...
- 1,648
2
votes
2
answers
162
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,...
- 2,005
1
vote
2
answers
95
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 ...
- 481
8
votes
8
answers
636
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:
...
- 4,313
2
votes
1
answer
35
views
StringReplace with Style will cause another character in the string [duplicate]
StringReplace["abbaabbaa", "ab" -> "X"] will output XbaXbaa, but ...
- 425
2
votes
3
answers
116
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 ...
- 425
7
votes
4
answers
222
views
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
108
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. ...
- 4,642
5
votes
5
answers
263
views
2
votes
2
answers
121
views
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 ...
- 2,005
2
votes
2
answers
151
views
Reading the contents of a file into a list
I would like to read the contents of the file.txt into a list of the following form: {1,0,1,12,0,1,0.25,0.012,0,1,0.25,0.026,0,1,0.25,0.057,0,1,0.25,0.090}.
How could this be done?
In these variants, ...
- 1,753
6
votes
6
answers
508
views
Application for StringDelete
I have a list of strings:
lis:= {{"123 abc def 456"}, {"ghi jkl 789"}, {"012 mno pqr"}}
and I would like to remove digit characters ...
- 4,313
1
vote
2
answers
98
views
How to extract the following data from the file?
Consider the following file. It has the form
...
- 4,642
0
votes
0
answers
37
views
Turn string with () as function brackets into expression
I have a text file with an equation where all the brackets are formatted as (). For example I read in the equation 2*(Re(a)+Im(b)) as a string. Now I am wondering if I can make this into an expression ...
- 1
3
votes
2
answers
179
views
Importing a text file of values and converting it to table
I just started using Mathematica. I got some output in a txt file from some computations in Pari/GP which looks like this:
$$ [1,2,3,4; 5,6,7,8]$$
Here I want to import the data into Mathematica and ...
- 103
1
vote
2
answers
55
views
2
votes
0
answers
62
views
Pick position of a particular list in the list of lists [closed]
Suppose I have some following lists with different size
...
- 801
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votes
0
answers
44
views
Define or remove a long form input \[xyz]
There are "InputAliases" ⵗxyzⵗ, "InputAutoReplacements" xyzspace, and things we'll call "long form inputs" \[xyz]. It's easy to view and modify the former two ...
- 3,897
1
vote
0
answers
61
views
Byte array to String with no internal processing, e.g. 𓃰
UTF8 defines a way to map from bytes to glyphs. In particular, glyphs with code <128 can be 1 byte, glyphs with code <2048 can be 2 bytes, etc. up to 4 bytes. For instance, the white queen <...
- 3,897
4
votes
2
answers
123
views
Selecting sublists from a ragged array of lists of strings
A ragged array of strings with a mix of sublists is processed to output some sublists and not others.
The sublists to output have a date, data, and information; in no particular order.
The information ...
- 51
3
votes
3
answers
86
views
Selecting particular data with a particular string at-first
I have a dataset and I want to select the only data that starting with C_i (where "i" is a numeric with variability).
Here is my dataset:
...
- 441
9
votes
4
answers
2k
views
Find Roman numerals up to 100 that do not contain “I"
The question is from Elementary Introduction to the Wolfram Language, section 28 Tests and Conditionals: Find Roman numerals up to 100 that do not contain “I”.
What am I doing wrong that the following ...
- 481
5
votes
2
answers
89
views
Is there a difference between a (general) pattern and a string pattern?
I have a list myList that contains several strings. I wish to use Position to find the positions of strings in ...
- 10.4k
0
votes
1
answer
46
views
9
votes
4
answers
614
views
Check if a string is a date
I have a list of strings,
{"BD4675365", "Corp", "Managers", "Syndicate", "2021-03-08", "8434926"}
and I ...
- 2,027
4
votes
1
answer
141
views
Is it possible to improve efficiency of the function?
I have the following function scriptQ to check whether an expression is a "script" or not.
This function is frequently called by others, so I need to ...
- 2,208
5
votes
3
answers
662
views
Split string at first space?
How can I split a string at the first space character in it?
For example, "First I. Last, Jr." should become {"First","I. Last, Jr."}.
- 11.8k
1
vote
2
answers
148
views
Associating a string variable with a numeric variable
There is a translation operation from a numeric variable to a string variable:
a[i_, j_] := Symbol["a" <> ToString[i] <> ToString[j]]
How ...
- 1,753
2
votes
2
answers
93
views
Map, applying list in a defined function
Suppose I have defined some function (This is arbitrary)
F[alpha_,a_,b_,c_]:=List[alpha,a+b+c]
I want to apply this F for a given huge list of sets
...
- 801
3
votes
2
answers
131
views
Small trouble with variable referencing in StringReplace?
I am trying to do the following:
Take a string abcdEFGpcf and replace whatever is between abcd and ...
- 5,121
4
votes
2
answers
82
views
Decomposing input to two list
Suppose I have $j[1,a1,a2,a3,a4,a5]$, I want to extract this as $\{1,\{a1,a2,a3,a4,a5\}\}$.
--My first trial:
Using the command Split, I can make
...
- 801
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2
answers
145
views
0
votes
0
answers
18
views
For given rules, discard some rules by imposing conditions
For a given input, and after some implementing conditions I want to discard unnecessary rules and pick only relevant rules.
More explicitly, suppose I have a following transformation rules.
...
- 801
3
votes
2
answers
244
views
How to. automate nutrition calculation
Given a vector of quantities:
fbs = {6.18*10^6, 2.663*10^6, 1.4735*10^7};
I like to create the following code:
...
- 5,470