Questions on the manipulation of String objects in Mathematica, and the functions used for these manipulations.

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1
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1answer
191 views

How can I convert a fraction to a string that can be used in a file name?

I want add an index to the file names of my exported images, so I'm using ToString. But I have a problem when my index is a fraction, because then the generated ...
1
vote
1answer
122 views

Remove line breaks or return codes from string

I have imported string data, which appears to have line breaks or return codes in it invisible in a notebook input cell. Copying a string and pasting into Apple Pages with control codes showing gets ...
10
votes
3answers
420 views

Modifying strings in a list efficiently

I have a list of strings $\{s_1,s_2,\ldots,s_n\}$. I would like to to produce the following list of strings: $$ \{s_1<>1,\ 1<>s_2<>1,\ldots,\ 1<>s_n\} $$ In other words, I want ...
2
votes
1answer
67 views

Recurrence relation for multivariate polynomials

I am trying to define a function which recursively computes a polynomial associated to every binary string: ComputePoly[s_]:=(** Recurse on the string s**) For ...
3
votes
3answers
254 views

How to extract numeric value?

Considering two situations: I have a string "F2.5" and Quantity["2.3s"]. How can the numeric value be extracted to have: ...
0
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4answers
61 views

How to trim out sequence of blank-spaces?

Considering we have few strings: s1 = "dasbdk " s2 = "asdnkal asn knkl nkn dvklsn " s3 = " jbjkbasd nklnkln " Q1: How can the blank-spaces in ...
3
votes
2answers
178 views

Rule transformation between letter and number

I have a global rule as follow: ...
10
votes
3answers
292 views

Mathematica equivalent to Python long raw strings? handling escape characters in packages

I'd like to write the following in plain text .m file in Mathematica, without having to double escape all the Latex commands: ...
0
votes
0answers
77 views

Shortest Common Superstring for all k-length strings on an alphabet

Given all strings of length $k$ of an alphabet of size $n$. This gives $n^{k}$ strings. Now I want to create one superstring that contains all these strings as substrings. They hopefully strongly ...
0
votes
1answer
79 views

Stringifying $GeoLocation for the browser

Currently, when I ask for ExportString[{"geoLocation"->TextString[$GeoLocation]},"JSON", "Compact"->True] I get this: ...
9
votes
1answer
152 views

Naming a pattern changes outcome in StringCases[]

s = "1 2 "; StringCases[s, (n : NumberString ~~ " ") .. ] StringCases[s, (NumberString ~~ " ") .. ] yields ...
0
votes
1answer
74 views

Replacing every nth comma in string output with “\n” [closed]

Feels like a strange question to ask, but I basically have a string with sets within sets, and it seems like the simplest formatting solution to seeing the data without needing to import everything ...
5
votes
2answers
113 views

Dataset breaks multi-character StringSplit

Given ds = Dataset[{"a b", "c-d"} ] multi-character StringSplit is broken with Dataset (...
0
votes
2answers
119 views

Match groups in regular expressions

I'm trying to understand Mathematica's pattern matching in strings, but I have some doubts. 99% of the time I need to a) check if a match occurs and b) retrieve the matched patterns. I come from ...
1
vote
3answers
245 views

How can I use functions in file paths?

I'm very new to Mathematica and I'm trying to write into a file. I want to have a function in my file path. For Example: ...
5
votes
1answer
115 views

Handy dates conversion

I feel like something very basic is missing me, $dateformat = {"Year", "Month", "Day", "Hour"}; date = DateString[$dateformat] DateString["Date"] ...
1
vote
1answer
90 views

Is there a way to convert a string to a Table indicator? [closed]

I have a list like this: list = {"k1","k2"} I want to use the elements in the list as Table indicators: ...
1
vote
1answer
113 views

Change parentheses to square-brackets when using CForm

I'm not experienced with Mathematica, but am learning to appreciate its awesome power for manipulations. I get the an expression like this when using CForm (I cut ...
0
votes
1answer
92 views

Dataset fails on StringMatchQ warning due to Missing value

Missing values are a pain mathematically and computationally in general not just in WL, but I think this problem is more related to Dataset handling of warnings: <...
2
votes
2answers
170 views

Input a non-string input — output as a string

I am trying to create a function that needs to transform its input into a string. The objective is to transform a $\LaTeX$ mathematical expression into an executable Mathematica expression. ...
0
votes
2answers
54 views

How do I use DictionaryLookup to exclude words with certain phrases?

I'm looking to use DictionaryLookup to search the English dictionary for words that don't contain certain strings. For example, I want to exclude ...
1
vote
1answer
89 views

Importing Data Issue, Breaking Up Elements

I am trying to import a comma delimited text file as a Table and I am having two issues: First, the file imports all of the numbers that should be separate columns as a single string. This is not ...
0
votes
2answers
196 views

How to remove unnecessary brackets in one formula

I have some string,like "3+(3*(2+5))", obvious that some brackets are unnecessary. It can write like "3+3*(2+5)", so I try to use Inactive. ...
5
votes
3answers
124 views

Elegant way to drop rest of a string at the occurence of a character

For example, I have a string "ahfiehfke$jfwfjejf0". Is there an elegant way to drop all characters after "$"? I know loop ...
10
votes
2answers
230 views

Comparing natural language strings

I have a large spreadsheet with thousands of rows/columns of text. Some are saying essentially the same thing but in different ways. When you enter a natural language question Wolfram Alpha makes a ...
1
vote
1answer
121 views

Dealing Repeated pattern in StringReplace

A problem about StringReplace When I'm running into this problem possible [bug] ...
4
votes
3answers
378 views

How could I transform the YYYYDDD date string/Integer to YYYYMMDD date string?

suppose I have lots of YYYYDDD date Integers which look like(for example): ...
1
vote
5answers
166 views

How to split list to strings?

Considering a list: lst = {"1", "2", "3", "4", "5", "6"} How can I have two strings : str1 = "1, 2, 3" str2 = "4, 5, 6" ...
0
votes
2answers
62 views

string and subscript in label

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1
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2answers
107 views

Trouble with ToString and StringForm

The command ToString[StringForm["SomeText=`` as well as OtherText=``.", "textA", "textB"], FormatType -> InputForm] produces the output ...
2
votes
4answers
290 views

How to switch from array to string?

Considering we have an array: a = {2/3, 4/5, 9/7, 3/7, 1/7, 1/9}; How can I get this to be: "2/3 4/5 9/7 3/7 1/7 1/9" ...
0
votes
1answer
119 views

Replace a number in a string

I have several data files I want to import. The names of these files consist of a part that is the same for all of them and a number which identifies them, as in ...
6
votes
1answer
114 views

Error when combining Except, “*” and an additional character

Bug introduced in 5 or earlier and persists through 10.4.1 Anyone knows why ...
5
votes
4answers
723 views

A too complicated lookup

I have the following keys: nm = {"bay", "ica", "rat", "tat", "dax", "dow", "sp5", "nas", "mean", "total"}; which I want to use to find a corresponding entry in ...
1
vote
3answers
209 views

How to manage list of list of rules?

Considering we have a list: str = "{1 -> {a -> aa, b -> bb}, 2 -> {2a -> \"{b -> bb}\"}}" Bringing this to expression gives: ...
1
vote
2answers
140 views

How do I use ReplaceAll to replace strings of a specified form?

Why is "Xabcde" /. "X" ~~ e__ -> e "Xabcde" and not "abcde"
2
votes
5answers
183 views

How to convert string to integer list?

Saying we have a string: "1 2 3 4 5 6" I want to convert this to integer list. First I do: ...
2
votes
3answers
179 views

How to delete a pattern from String?

Having a string like : "{Aaaa -> a, Bbbb- > b, Cccc -> , Ddddd -> c, Eeeee -> , Fffff -> e}" I want to delete the parts that contain ...
35
votes
2answers
840 views

String-manipulation bugs in v10.1

Fixed as of 2015-04-06 via paclet update. The new version 10.1 has introduced some strange (possibly buggy) behaviour compared to v10.0: ...
0
votes
1answer
69 views

How to check String format?

How can I check if the string contains a real or integer number, space and string? e.g. StrCheck["156 af"] = true ...
0
votes
1answer
49 views

How to manipulate string parts?

Let's consider I have following string: "{a-> POR, b-> D610, c-> 0, d-> \"300/7\", e -> \"1/400\"}" How can I run over and update anything that is ...
2
votes
1answer
237 views

How to parse string to expression? [closed]

When trying to make a string an expression I see some wrong results: ...
14
votes
7answers
845 views

How to sort digits in a string while keeping other characters untouched?

Now there is a string with digits and letters, for instance, "95uge678r3gi89hgfe30kgh063d51". And the expected output is ...
16
votes
5answers
653 views

Opposite of StringSplit

What is an appropriate command that does the opposite of the following? StringSplit["a b c d e f g"," "]
0
votes
1answer
53 views

Selecting from a list [duplicate]

OK, I know this must be a simple problem, but right now I'm just stuck and need some advice with this :). I have the following list: ...
0
votes
2answers
49 views

How do I complete this function len for the length of a line segment?

I need to have len[{{x1,y1},{x2,y2}}] is Sqrt[(x2-x1)^2+(y2-y1)^2]. The beginning of the function will be defined as ...
3
votes
1answer
61 views

Sort Unicode characters

Sorting ASCII phrases works fine: Sort[{"albatrob", "abo", "dict", "star", "mangel", "m"}] (*{"abo", "albatrob", "dict", "m", "mangel", "star"}*) But unless I'm ...
3
votes
1answer
157 views
7
votes
4answers
474 views

Strange answer from StringReplace

I have a list of strings and I would check if there is an empty string element, that's "", because I need to replace it with a "0". I try the following ...
0
votes
2answers
174 views

Get a filename used in an import and store it as a variable

Hopefully a simple one for you (or at least seemingly)! I import a .txt file, from which i make a ListLinePlot. I simply want to read in the name of the file, store it in a variable so I can use it ...