Tagged Questions
17
votes
0answers
117 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:
...
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?
6
votes
3answers
273 views
Specifying string patterns in DeleteCases
It seems that DeleteCases is not compatible with string patterns, at least directly (see, for example, this question). Is this true? If so, why is this the case? ...
4
votes
4answers
288 views
Creating lists from a string, separating words from numbers
Say I have a string that contains numbers and words, such as this one:
string = "there are 1234 words and numbers 5678 in here $999";
How would I separate the ...
3
votes
2answers
165 views
Highlighting text with StringReplacePart but also using Style, Subscript
For a Natural Language Processing analysis task it's desirable to highlight a text string programmatically according to XML tags that reference specific words or phrases.
The XML tags specify the ...
11
votes
2answers
173 views
2
votes
2answers
143 views
Formatting text through pattern matching
I am trying to format some text based on some patterns.
...
14
votes
2answers
339 views
How do I perform string matching and replacements?
What are, and how do I use Mathematica's string matching and replacement tools?
6
votes
1answer
186 views
Creating a version of SequenceAlignment that accepts patterns
SequenceAlignment seems like a function that is not (yet?) fully integrated into Mathematica. I want a function that accepts general patterns instead.
I ...
15
votes
1answer
328 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 ...
12
votes
2answers
227 views
Split a Unicode string maintaining uppercase characters
I want to split a string according to a predefined set of substrings (lowercase), though the actual text can contain uppercase characters anyplace. The task is to find the matches, longer preferred ...
-2
votes
1answer
173 views
How to set a rule in pattern matching to change a string from one form to another
I want to define a rule that will change a particular type of string to another form.
For example:-
a string having ...
16
votes
6answers
524 views
Split a string at specific positions
Given a string of alphanumerical characters, how to split it simply and quickly at the center of continuous letter-substrings? Is there an elegant and fast solutions out there in the "computational ...
6
votes
1answer
156 views
How to set up new types for pattern matching strings?
Consider the following toy example: I have a set of language sounds, which I partition into two exclusive subsets, consonants and vowels. I want to set up string patterns for e.g. ...
