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
43 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 ...
0
votes
1answer
53 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
19 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 ...
2
votes
2answers
107 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 ...
6
votes
2answers
108 views

Unexpected result from StringReplace

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

How can I lookup the grammatical type of a word?

It seems WordData isn't complete: ...
1
vote
1answer
120 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
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1answer
51 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
49 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 ...
4
votes
3answers
364 views

Camel hump string split

Given System names of 2 or more characters: systemNames = Names["System`*"] // Select[StringLength[#] > 1 &] ; Is ...
3
votes
3answers
194 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
534 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
32 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
170 views

Returning computable numbers from WolframAlpha

WolframAlpha["Apple company revenue", {{"Result", 1}, "Plaintext"}] Desired output 182800000000 ...
1
vote
1answer
51 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
47 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
74 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
94 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
175 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
58 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
204 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
106 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
64 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
152 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
178 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
154 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
85 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
73 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 ...
0
votes
2answers
74 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
49 views

Retain or delete parts of textstring in tweets

For a twitter analysis I collected many tweets. For example: ...
11
votes
1answer
156 views

Bug in Operator Form of StringCases

According to the documentation there's an operator form for StringCases ?StringCases Here is the normal form ...
8
votes
2answers
530 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, ...
21
votes
1answer
253 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
623 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
194 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 ...
6
votes
1answer
136 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
360 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
172 views

Isolating string characters

I have the following string: ...
6
votes
2answers
243 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
105 views

Simple string pattern crashes kernel

The following code crashes my Mathematica kernel (v9, MacOS): ...
2
votes
0answers
48 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
74 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
122 views

Manipulate strings within a list

Let's say I have Solve[x^4 + 3 == 0, x] with output ...
6
votes
3answers
201 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
86 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
82 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: ...
6
votes
4answers
583 views

Caesar's cipher

How can Caesar cipher be implemented? I want to use StringReplace but I don't know how to write the replacement rule to replace the characters with, say, the ...
6
votes
1answer
209 views

Dataset and string conversion, using Internal`StringToDouble

i'm trying to get familiar with the new Dataset-stuff in Mathematica 10. As it will (hopefully) provide some benefit for me, I have started to convert my app to move from list and list of rules to ...