Questions on the manipulation of String objects in Mathematica, and the functions used for these manipulations.
2
votes
1answer
57 views
Explicit asterisk or @ sign in string patterns
What string pattern will match an explicit asterisk (*) or at-sign (@)? The obvious example, StringMatchQ["*", "\*"], returns ...
1
vote
0answers
71 views
How to extend dictionary.txt
How to extend the default dictionary.txt for Dictionarylookup to all words?
For example, first I
...
18
votes
0answers
123 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:
...
4
votes
5answers
144 views
A simple StringCases problem
Given this text:
text1 = " A Vitamin D Deficiency (ICD-9-CM 268.9) (ICD-9-CM 268.9) 09/11/2015 01 ";
Yes, the ICD code values are duplicates- possibly but ...
4
votes
3answers
100 views
Find the position of a string element, knowing only part of the string
I have a list, e.g.:
list = {1, 2, 3, "Element 1", 4, 5, "Element 2", "Something else 1", "etcetera"}
Now, I want all elements starting with ...
6
votes
1answer
89 views
How does `LongestCommonSubsequence` work?
When I recently came across this posting about LongestCommonSubsequence I was curious about how the function worked.
...
3
votes
1answer
98 views
String replacement to make the TeXForm output beautiful
This question is inspired by this question: How to convert the symbol $d$ in Integrate into $\mathrm{d}$?.
Although it’s not a big problem, the TeXForm can be ...
0
votes
0answers
78 views
How to highlight a string pattern? [duplicate]
This is an example in the help pages (Working with patterns: Highlight Patterns):
...
10
votes
1answer
159 views
Mathematica equivalent of regex '\w{2,3}'
It beats me to write the Mathematica pattern equivalent to the regex:
\w{2,3}
Any ideas?
1
vote
2answers
81 views
Image processing - How can I apply an operation to several images at once?
I imported pictures into Mathematica, and used names for them that follow the easy scheme "name" string joined with an integer, ranging from 14 to 20. Printing these images on screen works nicely:
...
0
votes
2answers
88 views
help with StringJoin [duplicate]
dollarWon := 100
"(" <> Style["$" <> ToString[dollarWon], If[dollarWon >= 0, Darker[Green], Red]] <> ")"
I am getting an error: String ...
5
votes
2answers
86 views
How to count words in a Greek text
I want to perform a simple analysis of some Greek text: collect the different words used and count their frequency. It seems that some of the built-in commands do not work well with Greek letters. For ...
1
vote
2answers
49 views
How to convert TableForm to proper LaTex and why is “\” not replaced by StringReplace?
I'm trying to optimize the teXForm output of a table because the standard output ist not satisfying:
...
9
votes
2answers
196 views
Transform fancy usage messages in 1D string
When we look at the usage messages of built-in functions nowadays (not in the good old times, when they were a simple descriptions) we see that although they look pretty in the front end, it is really ...
2
votes
2answers
98 views
5
votes
3answers
113 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
...
14
votes
2answers
199 views
Haiku Extractor
Inspired by the cool Tumblr Haiku Times that searches for accidental haiku in New York Times articles, I tried my hand at implementing such a search in Mathematica for my own text samples.
I'm still ...
1
vote
2answers
108 views
Finding strings in Web Code [duplicate]
I haven't found an answer that solves my problem, although I think it's actually a simple one. It seems hard to me because I don't have a lot of experience with string patterns.
I have a Web Code ...
0
votes
1answer
58 views
Construct file names using a number and a string prefix [duplicate]
I'm trying to append filenames with Mathematica, and cannot do it.
The output of my calculation are two lists : X and Y, ...
-4
votes
2answers
90 views
how can i convert data into string format? [duplicate]
I have nested-lists in number format,like
data={{1,2,3},{2,{3,4,50}},{4,5,6},{3,{3,{5,6}}}}
I want to convert each number into ...
4
votes
1answer
72 views
Extracting text from cells, preserving non-ASCII characters
Consider the following setup, based on this answer by WReach:
...
1
vote
2answers
176 views
Faster way to convert real strings into numbers [duplicate]
Working with big files, I have to convert some numbers that are in string format into real MMA numbers. I know that I can use ToExpression but it's slow when ...
1
vote
2answers
108 views
Why do I get two different results from StringLength?
I spent a reasonable amount of time to find the origin of an error in a larger code segment.
...
0
votes
3answers
122 views
How to export a header before the data in the result file?
I would like to export a phrase to my result data as a heading.
I'm exporting the data correctly with
Export["file.dat", table].
But I'm doing several ...
8
votes
3answers
182 views
balanced Shortest[] and string-patterns
The pattern Shortest["A"~~__~~"B"] is oriented : It assumes the text is read from links to right and it takes the text between the first "A" and the next "B".
Any ...
7
votes
1answer
172 views
What pattern will match accented letters in a regular expression?
How should I modify the following such that the accented letter É is matched and the expression returns True?
...
5
votes
2answers
171 views
Concatenate strings from different levels of list
After a lot of trouble I've finally come pretty close to what I want to do. I now have a list that looks like this:
...
2
votes
1answer
90 views
Confused behavior using Dispatch to sort one list relative to another
I have a need to sort the entries of one list into the same sequence as the entries in a reference list. Because I have rather large lists involving strings, I'm trying to use Dispatch to accomplish ...
2
votes
4answers
129 views
How to write a function to remove comments from a .m source file preserving formatting such as line wrapping reasonably?
How to write a function to remove comments from a .m source file preserving formatting such as line wrapping reasonably?
This means if I have
...
1
vote
1answer
149 views
Renaming files of form FileName(i).csv to NewNamej(k).csv where j increments and k resets to 1 when there is a jump in i?
Edit up top: The accepted answer works splendidly except I had to add //ToExpression to the end of the definition of ns given by ...
8
votes
6answers
319 views
How do I extract a number from a string?
I want to extract the number from an alphanumeric string. This is what I tried:
StringTake["thiru3", {6, 6}]
The result I got is ...
2
votes
3answers
226 views
How to extract a consecutive list of substring from a string?
Given a list of strings:
data = {
"2894;Hot Pink;53:09:44;1449714",
"17456;Dark Cyan;19:06:42;6929227",
"5147;Lime;54:11:55;5247632"
}
(Words are separated by ...
3
votes
0answers
84 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 ...
4
votes
2answers
88 views
How can I know if a pattern corresponds to a string pattern?
What would be the best way to detect if a pattern corresponds to a string pattern ?
An invalid string pattern p would lead to an error in ...
10
votes
2answers
257 views
Mathematica Typing Effect
Here is a Typing Effect in javascript.
I could only implement a very simple one:
...
4
votes
1answer
78 views
Strange behavior of DateList when converting string
DateList experiences some strange behavior which i cannot explain.
This code works fine:
...
6
votes
4answers
241 views
Where can I take a pool of words from?
Dear Community members,
I am thinking about an interactive machine to teach a school child to write difficult words correctly. As a first step I need a collection of words. I will select a pool of ...
0
votes
1answer
112 views
How do I construct a “named character” programmatically?
Why am I getting the error
Syntax::sntunc: Unicode longname in the string is unterminated.
from the following?
...
9
votes
5answers
368 views
convert long string to integer list
at first, i would like to thank all the people here. i'm working with mathematica for half a year now and always found great advice and tricks.
now, i came up with a problem i couldn't find a ...
9
votes
3answers
261 views
How to remove accents from text?
I would like to know how I can remove accents from a string. For example, how can I transform "string test áéíóú" into ...
3
votes
2answers
100 views
Import[] exception possibly caused by ToString[] behaviour which I cannot explain
Let me just start by pointing out I'm a new StackExchange user as well as a new Mathematica user (started today!) I mention this as a context to my ineptitude :)
I am attempting to read through a ...
4
votes
1answer
48 views
32
votes
3answers
817 views
Visualizing the difference between two sequences (strings)
I'm trying to develop a way of comparing two sequences (probably originally text, such as text writing or source code, possibly converted to lists). As a familiar example, consider the revisions ...
14
votes
6answers
386 views
Splitting a list by specifying section headers
I have a list of strings called mylist:
mylist = {"[a]", "a", "a", "[b]", "b", "b", "[ c ]", "c", "c"};
I would like to split ...
2
votes
1answer
80 views
ToString in a function
f[x2_] = ToExpression[StringTake[ToString[x2], -1]] x2;
f[a3]
(*Out: 2 a3*)
I expected the output to be 3 a3, but apparently ...
3
votes
3answers
338 views
Parameters in plot titles
My issue is how to mix strings with variables, specifically in the context of PlotLabel:
I can put a string as my plot title, and I can also put a variable as a ...
4
votes
2answers
154 views
Split string into sub-strings of length n [duplicate]
Possible Duplicate:
Partition string into chunks
How can I split a string into sub strings of length n? For example I have a string
"ABCDEabcde1234"
...
6
votes
3answers
122 views
Importing and manipulating strings - time data
I have a list of time durations, which are strings of the form: "hh:mm:ss". Here's a sample for you to play with:
...
8
votes
2answers
479 views
Convert a string to hex number?
How can I convert a string containing a hex number such as "6b" to a hex digit that mathematica can use to do math with?
I have tried using ...
18
votes
3answers
408 views
How to join two Style[]d strings
Does anyone know whether it is possible to combine\join two styled strings?
That is, while the following code works fine:
omega = "text";
omega<>omega
...
