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

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5
votes
1answer
201 views

Escaping multiline strings in Mathematica

I want to assign long multi-line strings in Mathematica. Is there a way of delineating a block without having to escape each instance of '"' with '\"' and each line ending with '\'? i.e. In other ...
2
votes
3answers
185 views

Problem displaying uppercase “I” in a string [duplicate]

It seems that Mathematica reserves the capital i, I, for the imaginary unit. I have the following expression: expr = a.b + II ...
13
votes
4answers
414 views

Unencoding encoded URLs in a function

Is there a built-in function for decoding encoded URLs in Mathematica? I would like to convert an encoded URL, for example ...
6
votes
4answers
284 views

Shorter shorthand for StringJoin[]?

As a minimal working example: myString="some words"; myString=myString<>"more words"; Is there a shorter way to tell Mathematica that I want to "tack on" ...
8
votes
1answer
174 views

Simple string pattern crashes kernel

Bug introduced in 6.0 or earlier and fixed in 10.1.0 The following code crashes my Mathematica kernel (v9, MacOS): ...
25
votes
1answer
321 views

StringCases is Confused with Patterns in Version 10.0.1

Bug introduced in 10.0.1 and fixed in 10.0.2 I observed the following with StringCases when trying to use rules/patterns. Here is a screenshot of the behavior: ...
6
votes
7answers
364 views

Convert array from {{…}} to “[[…]]”

I have made this function: conv01 = Map["["<>StringJoin@@Riffle[#,","]<>"]"&,Map[ToString,#,{2}],{0,1}]& to convert: ...
3
votes
1answer
201 views

Using Probability for n-gram string queries

I want to use Probability to ask questions on strings like "what's the probability of the occurrence of the trigram 'the' conditioned on the occurence of the digram 'th'?" This doesn't work. I ...
10
votes
1answer
300 views

How to change the font color of a variable in whole input cell

I want to track the occurrence of a particular variable in a code. So the idea is to change its color. Usually I do it in a crude way - convert the code into text and then use ...
21
votes
2answers
605 views

Why is TextString[-0.5] a positive number?

Bug introduced in 10.0 and fixed in 10.0.2 I want to format numbers in decimal notation and chose TextString for this task. But today, when looking at the final ...
1
vote
2answers
55 views

How to define a function `deriv[f[x]]` such that its output is an unevaluated expression `fx=D[f[x],x]`?

I want to define a function deriv[f_[x_]] such that when I run deriv[f[x]], the output is an unevaluated expression ...
35
votes
2answers
839 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: ...
2
votes
1answer
63 views

How to extract part of association?

Considering an association: asc = <|"a"->1, "b"->2, "c"-><|"e"->3, "c"->4|>, "d"->5, "e"->6, "f"-><|"g"->7|>|> How ...
4
votes
2answers
98 views

Usage of StringTemplate

The documentation for StringTemplate has the following example ...
5
votes
1answer
71 views

Export XMLElements with MathML contents

Setup Here's my mathML expression: mathML = ExportString[1/2, "MathML"] ...
3
votes
1answer
366 views

Decode a text which is encoded with UTF-8

I would like to decode a text which is encode with UTF-8. My code is here : ...
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 ...
7
votes
1answer
75 views

A possible bug about WordCharacter on CJK characters

According to the documentation of WordCharacter: WordCharacter matches any character for which either LetterQ or DigitQ yields True. However, the results of the following code seem not ...
0
votes
1answer
34 views

How can I name to a saved file with the numerical values of some specific parameters? [duplicate]

I'm using some parameters to determine the elements of a list. I want to save this list with DumpSave, but I need to name it with its parameters. For example, I use the following parameters ...
2
votes
1answer
57 views

How to insert a character in a string with condition?

Considering we have a string: str = "1a 789 4/7 123/7 asff %$#7 478 9/4" How can I insert "/1" for the numbers that are ...
0
votes
1answer
44 views

StringJoin Dynamic problem [duplicate]

My goal is to import a XML file from the site fueleconomy.gov to get a list of cars dependent on the year given as the user input . Here is the code: ...
1
vote
0answers
21 views

Use functions to call a named object [duplicate]

Now I have several interpolation functions called x30, x50, z30, z50...... I wish to write a function to call these function by inputing x or z and numbers automatically, and assign a argument x to ...
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
2answers
121 views

String quotes elimination

I'm trying to import a .csv file that contains some points which are geo-positions, but the import gives me the points wrapped in quotes. Is there any method to get them as pairs of real numbers? I'm ...
0
votes
0answers
81 views

How to parse fraction to a number?

Considering a fraction: val = "F \!\(\*FractionBox[\(1\), \(1\)]\)"; I extract the part of interest: ...
0
votes
3answers
164 views

Positions of a string in a list [duplicate]

Sorry for the bad title..Didn't know how to describe this, feel free to change it to be more specific. I have a list in this form: list = {"a(0)", "a(1)", "a(2)"} ...
1
vote
1answer
58 views

How to rationalize real number in string?

Considering we have: in = "F 18/10" How can I make this to be: Thanks!
5
votes
3answers
364 views

how to concatenate a list of a list of strings

I have two lists of lists, La and Lb that I want to concatenate so that every element of a list n in La is concatenated with the corresponding element of list n in Lb. For example: La = {{P, O, O, O}...
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. ...
4
votes
2answers
89 views

How to delete blank valued keys from nested association?

Considering we have: acs = <|"A" -> <|"a" -> " ", "aa" -> "asd"|>, "B" -> <|"bb" -> " "|>|> How can we come to have a result ...
3
votes
3answers
146 views

How I can count multiplications in an experssion?

Next task to complete: Count *-symbol in such expression as a + s^2*b - c/y + o^3 + n*m*u (in this case count of ...
8
votes
3answers
404 views

String matching balanced pairs of braces

I am trying to extract from a string in Mathematica all instances of \newcommand{ABC}{DEF} Where ABC and ...
1
vote
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 ...
13
votes
3answers
442 views

ToExpression fails with long nested string expressions

Consider the following conversion from String to Mathematica Expression: ...
2
votes
2answers
92 views

Using Table with arbitrary number of variables [duplicate]

Let $P=\{p_1,...p_n\}$. I would like a way to implent Table[Expression,{$p_1$,lim},{$p_2$,lim},...,{$p_n$,lim}] where n and lim are parameters defined by the user. Any ideas?
1
vote
1answer
118 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 ...
11
votes
3answers
385 views

How do I make a string literal without having to escape backslashes?

I'd like to say something like: foo = @"\abc\def\ghi" instead of foo = "\\abc\\def\\ghi" How do I do this? This would ...
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 ...
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
votes
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
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 ...
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 (...
7
votes
1answer
191 views

Unicode beyond Basic Multilingual Plane

String manipulation takes a dive when characters beyond \:FFFF are used e.g. Mathematical Alphanumeric Symbols. The characters display fine but doing string ...
0
votes
2answers
117 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 ...
6
votes
3answers
556 views

Camel hump string split

Given System names of 2 or more characters: systemNames = Names["System`*"] // Select[StringLength[#] > 1 &] ; Is ...
0
votes
2answers
195 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. ...
1
vote
1answer
121 views

Dealing Repeated pattern in StringReplace

A problem about StringReplace When I'm running into this problem possible [bug] ...