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

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0
votes
2answers
94 views

Using StringReplace to make file names

Often I'm making many plots for different values of parameters. Each plot has a nice PlotLabel with superscripts, subscripts and some special characters. I would ...
1
vote
3answers
323 views

Swap first and last names in a list

Edited to fix an inconsistency in the given example data format. I'm trying to write a simple function to load in a csv list of names which is formatted as "Lastname Firstname Initial " and ...
1
vote
3answers
394 views

Replace with position and order number

question conversion1 : Convert "[AA]AB[AA]BB[AA]B[AA]CCC" to "[A1A2]A3B1[A4A5]B2B3[A6A7]B4[A8A9]CCC" conversion2 : Convert <...
1
vote
1answer
84 views

Are all of the numbers in my file legitimate hex numbers

I have about 10,000 hexadecimal numbers (32 digits each) in an excel file, in one column. I want to verify that all of them are indeed hexadecimal number and that no other characters are present. My ...
0
votes
2answers
89 views

Is there a manual way to generate a string of zeroes with a 2 at the end?

How do I get mathematica to display 33141015 zeroes and a 2 I've tried using 2*10^-33141016 but it just gives me scientific notation Is there a manual way to generate a string that looks like ...
3
votes
2answers
285 views

Regular expression too large problem

pattern = Names["*"]; StringMatchQ["Bold", pattern[[1 ;; -1 ;; 2]]] (* True *) StringMatchQ["Bold", pattern] Error Information: RegularExpression::msg20:...
2
votes
1answer
142 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 ...
2
votes
1answer
79 views

Using the string Match with options! [duplicate]

Here is what I want to do: I have a list of strings for example s={"red carpet","red box","black carpet","black box"} I want to use something like ...
18
votes
1answer
603 views

NotebookFind and String Pattern Expressions

Is there a way that NotebookFind can be used to match string pattern expressions rather than just strings? The documentation for ...
5
votes
3answers
201 views

How can I improve NumberString?

I would like to test strings to see if they represent numbers. This should include number representations with precision marks and scientific notation. NumberString ...
4
votes
1answer
87 views

Is the use of StringTemplate with a styled string documented behavior?

I was pleasantly surprised to find out that StringTemplate appears to work with styled (formatted) strings, with the style of the slots applied to the inserted ...
2
votes
0answers
103 views

How to efficiently find parts of a string with beginning and ending specified?

I'm trying to find specific URL addresses from a html document. The addresses can be found between the strings "href=\"" and "\" class=\"listing". The problem is not including strings like this: "href=...
10
votes
2answers
211 views
1
vote
2answers
105 views

Why doesn't ToString work in ReplaceAll? [duplicate]

I'm trying to use ReplaceAll in a subscript. However, it doesn't seem to work as expected if I want to use the output the subscript in a ...
3
votes
1answer
143 views

Strings with exclamation marks in Mathematica [duplicate]

Given this input FullForm[ToString[TraditionalForm[x]]] Mathematica outputs "\!\(TraditionalForm\`x\)" It seems like ...
7
votes
1answer
229 views

Limit characters/digits entered into InputField

When using InputField, whether setting the input type as a Number or String, is there a way ...
0
votes
2answers
174 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, https://onedrive.live.com/redir?resid=...
4
votes
1answer
158 views

How to convert expression with Subscript to string

I've tried ToString[], but it doesn't work properly with subscripts: How to convert expr with subscript to string with exactly the same FullForm that "expr" has?
4
votes
1answer
145 views

Parsing string with nested information

I am trying to parse a string, but I have no idea how to solve the following problem ...
0
votes
2answers
208 views

Decimal-to-ASCII conversion

I have to write a program that converts a number (decimal notation) to an ASCII string. For example, x = 26728 (or 0x6868) and the string is "hh". I wrote this, but it seems that it is not the ...
1
vote
0answers
88 views

Geodesy without units?

Suppose I'm interested in the latitude of Los Angeles and I do the following: ...
1
vote
0answers
44 views
0
votes
1answer
68 views

Data file organized in strings

I am working in a data set : The original question, They are strings of thousands stars,and each one contains a lot of parameters, and the following item is called identifies, they are the names (...
7
votes
1answer
168 views

LetterCharacter for Cyrillic symbols

Why does the code StringMatchQ["ы", LetterCharacter] return False? Probably because: ...
10
votes
2answers
212 views

Unexpected result from StringReplace

The following works as expected. StringReplace["xxxyxz", "x" ~~ _ -> "ww"] "wwwwww" And so does this. ...
3
votes
2answers
270 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 ...
1
vote
1answer
172 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 ...
3
votes
1answer
62 views
2
votes
1answer
77 views

How can I automatically name files being exported based on input parameters

I have Mathematica notebook that performs some operation say a=2 b=3 c=5 d=4 how do I set the output file after evaluation to be named using the values $2,3,5,\...
1
vote
1answer
36 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
76 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 ...
32
votes
1answer
692 views

Why is StringExpression faster than RegularExpression?

Edit: as noted by Albert Retey the performance difference is only seen when sub expression extraction is performed. If this test is used below the timings are similar: ...
7
votes
4answers
866 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 ...
3
votes
3answers
289 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 ...
15
votes
3answers
480 views

Grabbing a number of characters around a string pattern

If I have some string data: text = StringTake[ExampleData[{"Text", "DeclarationOfIndependence"}], 400] "When in the Course of human events, it becomes ...
6
votes
3answers
214 views
2
votes
1answer
44 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
200 views

Returning computable numbers from WolframAlpha

WolframAlpha["Apple company revenue", {{"Result", 1}, "Plaintext"}] Desired output 182800000000 ...
1
vote
1answer
154 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* - 3*...
43
votes
8answers
8k views

How do you convert a string containing a number in C scientific notation to a Mathematica number?

Suppose I have a string containing the C-representation of a floating point number, for example s = "1.23e-5" and I want to convert this to a Mathematica number. ...
1
vote
1answer
67 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 ...
1
vote
2answers
170 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 <...
8
votes
3answers
866 views

How to parse information contained in a file name

I have a set of files containing my data, and the file-names contain relevant information that I would like to extract. What I have is: ...
4
votes
1answer
690 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 ...
3
votes
2answers
258 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 ...
1
vote
2answers
92 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: ...
4
votes
5answers
333 views

How to join two strings one of which is Subscript? [duplicate]

If I write this one str=Subscript["x","y"]; StringQ[str] False How can I get str as string?
3
votes
3answers
286 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 ...