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

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7
votes
1answer
139 views

LetterCharacter for Cyrillic symbols

Why does the code StringMatchQ["ы", LetterCharacter] return False? Probably because: ...
0
votes
2answers
156 views

Exctrating data information from a file.txt

I really did previous long search in the site and I couldn't find any answer that might help me. So I am asking it. I have the following data set, ...
2
votes
1answer
94 views

Optimizing alphametrics code

First of all, thank you all in this great community. I have been reading a lot of threads about Mathematica optimization learning things like using Compile ...
1
vote
1answer
94 views

How to fill a Marshal buffer with whitespace using NETLink

Further to Todd Gayley's answer on string handling in a DLL function, I have the following code: ...
0
votes
0answers
32 views

Error when converting a string involving superscript after closing square bracket using ToExpression

I would like to store a piece of code in the form of a string, make some string transformation to it and get the new code evaluated using ToExpression. Everything works just fine but one: if there is ...
3
votes
2answers
147 views

how to extract the string using regular expressions

I have the list : a1 = {"struct name1 {","struct name2{","struct name3{","struct name4{", "struct name5{","struct lastStruct{"} I tried to extract the ...
10
votes
2answers
151 views

Unexpected result from StringReplace

The following works as expected. StringReplace["xxxyxz", "x" ~~ _ -> "ww"] "wwwwww" And so does this. ...
3
votes
1answer
48 views

How can I lookup the grammatical type of a word?

It seems WordData isn't complete: ...
1
vote
1answer
136 views

how to make a recursive function to analyse this file

I am stuck at this problem beginning We assume we have keyword k, and the structure in the file: file.txt ...
1
vote
1answer
73 views

Find item in a big list that contains a specific string [closed]

I have a huge list with 17,576 (=26^3) items in it. All items consist of a long string of text about 1,200 or so characters long. These strings were all generated ...
1
vote
1answer
34 views

Creat a global variable from an argument and being able to use it as a numeric input

I want something like this: myfun[j_]:=Block[ {ans}, ans = Range[j]; "phi"<>ToString[j] = Total[ans]; ]; The procedure is just an illustrative ...
0
votes
1answer
56 views

TraditionalForm for PlotLabel with a parameter

This is a simple variation/spin off of this question, but I am having trouble. In the second example in the original question, I'm trying to get the $a=$ in the ...
5
votes
3answers
425 views

Camel hump string split

Given System names of 2 or more characters: systemNames = Names["System`*"] // Select[StringLength[#] > 1 &] ; Is ...
3
votes
3answers
222 views

String pattern defined by number of characters

I want to extract non-overlapping substrings from strings with only four possible characters a,b,c,d. These strings will always have equally many "a" and "d" characters. The substrings x I want satisy ...
16
votes
2answers
552 views

Why is TextString[-0.5] a positive number?

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 result of my 3-weeks ...
2
votes
1answer
36 views

Linear function on strings using UpValues

I have two functions Sup and Sdown that take a string of letters with allowed characters ...
6
votes
1answer
187 views

Returning computable numbers from WolframAlpha

WolframAlpha["Apple company revenue", {{"Result", 1}, "Plaintext"}] Desired output 182800000000 ...
1
vote
1answer
68 views

Insert a linebreak and character repeatedly into a matrix output which is in fortranForm

Suppose I have a very long string which is a11 element of matrix a11=2*gopsv-2*Bgopsvw+2*acgmops*v+2*cgmopsv*B-2*acgmopsvB+3*gmopsvB-3*BgmopsvwB+m*w2*B +5*acgm2 +opsvB -ac*m2*w2*B +cgm2*opsvB* - ...
1
vote
1answer
54 views

Importing file as a string causes a puzzle

I generate simple txt file and import it as follows: a = Import["binary.txt"]; b = Import["binary.txt", "String"]. It appears then that lengths of imported strings ...
3
votes
2answers
91 views

Removing non-word characters in certain parts of a string

I would like to ask how I can remove non-word characters from a string, but only in certain cases. I have read this article, so I know how to get the words out of a string. My text is however a bit ...
1
vote
2answers
118 views

How to solve ArcSinh equation for many differents parameters?

I am totally stuck trying to solve the equation below (1/2) x Sqrt[1 + 4 a^2 x^2] + ArcSinh[2 a x]/(4 a) == d Where a and ...
4
votes
1answer
269 views

How do I remove single-character whitespace between words, leaving multiple, contiguous, whitespace characters unchanged?

In a string, I want to remove only the single-character whitespace between printing characters, leaving any multiple, contiguous, whitespace characters between printing characters unchanged? What is ...
1
vote
2answers
67 views

Generate a sequence of names such as a1, a2, a3 [duplicate]

How do I generate the sequency {disp1, disp2, disp3, ...}? I tried the following but it didn't give me what I expected: ...
3
votes
5answers
219 views

How to join two strings one of which is Subscript?

If I write this one str=Subscript["x","y"]; StringQ[str] False How can I get str as string?
2
votes
4answers
144 views

Finding relevant parts in XML document

My qyestion is about a XML document and finding parts of strings. test = Import["C:\\Users\\filename.xml", "XMLObject"] This gives the following output: ...
1
vote
1answer
74 views

Transforming a nested list for textual output

Hello I have a data structure based on lists, with items, subitems and subsubitems, and I want to display a textual output with a description. ...
2
votes
2answers
176 views

Difference between double quotes

I have a notebook and I enter something like PlotLabel->"my label with dynamic number "<>ToString[strange] and I get errors like However, the double ...
3
votes
3answers
204 views

Graph showing valid English words obtained by insertion of single characters

I'd like the most efficient Mathematica code for making a formal tree graph whose nodes are valid English word strings (in DictionaryLookup[ ]) and directed links represent the relation 'insertion of ...
5
votes
1answer
175 views

Conditional string replacement

I have a list of text and need to replace an element based on the text that appears in the element before it. Example of my list: ...
2
votes
1answer
105 views

Convert matrix of strings to matrix of numbers [duplicate]

I have 101 files each with a lot of data. from C output. (.out files) I have imported them to Mathematica 9. However, Mathematica reads the data from each file as an element of a table. So I used ...
1
vote
2answers
77 views

How to define a function that counts the exponents

I want to define a function $F$ described as follows: The input of $F$ is a polynomial such as m*u*x^4*y + n*v*x^2*y^3 where $m$ and $n$ are constants, and ...
1
vote
2answers
91 views

text analysis: split document in seperated lines

For a text analysis I want to split a large document in seperated lines. Then I want to calculated for example the average number of words. A example of the document is the following: ...
2
votes
2answers
53 views

Retain or delete parts of textstring in tweets

For a twitter analysis I collected many tweets. For example: ...
14
votes
2answers
193 views

Bug in Operator Form of StringCases

fixed in 10.1 (windows) According to the documentation there's an operator form for StringCases ?StringCases Here is the ...
8
votes
2answers
543 views

A femme is a wife is a Frau

As can be seen from LanguageData["Properties"] // Multicolumn Mathematica's translation capabilities seem to be very limited. It can translate month names, ...
23
votes
1answer
279 views

StringCases is Confused with Patterns in Version 10.0.1

I observed the following with StringCases when trying to use rules/patterns. Here is a screenshot of the behavior: Not only is the pattern highlighted in red, ...
11
votes
7answers
650 views

Splitting strings into letter keys and integers

I have strings of the following form: string = "ABC123DEFG456HI89UZXX1"; Letter keys of variable lengths are followed by (positive) integers. I want to get this ...
4
votes
4answers
237 views

Splitting a string into substrings of length 1 and 2

There is already a thread on how to split a string into equal sized chunks. I'm wanting to split a string into sets of substrings of length 1 and 2. For example, if I have the string "123456", my list ...
7
votes
1answer
164 views

Understanding `Paste` and how to get a string from the Clipboard to use with `ImportString`

Trying to work on this question I got distracted by my first naive attempt of copying the data and then typing dat = ImportString[Paste[], "Table"] ...
7
votes
5answers
389 views

Splitting strings at lower case characters and numbers

I'm trying to split the strings of chemicals into their elements and numbers. See this example "Fe3O4" will be split into ...
6
votes
3answers
182 views

Isolating string characters

I have the following string: ...
6
votes
2answers
279 views

Converting a string into a nested list of strings

The following string can be converted easily into a list with ToExpression ...
5
votes
1answer
114 views

Simple string pattern crashes kernel

The following code crashes my Mathematica kernel (v9, MacOS): ...
4
votes
0answers
89 views

Is it possible to Compile the function with string argument?

As we can see from the Compile documentation, the typical arguments for Compile should be ...
0
votes
3answers
84 views

Unexpected behavior of rule-replacing with string concatenation [closed]

Here's the code. Clear[x,y,z]; {x,y,z} /. x_ :> ("^_^" <> ToString[x]) I get the result ^_^{x, y, z}, which is not ...
1
vote
3answers
125 views

Manipulate strings within a list

Let's say I have Solve[x^4 + 3 == 0, x] with output ...
6
votes
3answers
208 views

Problem with WordBoundary in string patterns

I am trying to extract from a string all words that end with "-man", but the problem is that WordBoundary does not seem to work as it returns whole string ignoring ...
4
votes
3answers
95 views

Question about Replacements and String Manipulations

I'm trying to get better at Mathematica and in the book I'm using (by Nancy Blachman) is the following question (which apparently was taken from another book: The Art and Science of C) which reads: ...
2
votes
1answer
87 views

How to efficiently process pasted content from PDF

I had selected a matrix in a PDF file, and paste it onto my MMA notebook. Below is the exact copy-pasted content: ...