Using regular expression to extract numeric data from text file
12 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Søren Holm-Petersen
am 3 Mär. 2020
Kommentiert: Søren Holm-Petersen
am 4 Mär. 2020
Hi, I have a text file containing a bunch of lines with the following format:
"Triangle(Vector3D(-0.125, -0.375, 0), Vector3D(0.125, -0.375, 0.166396), Vector3D(0.125, -0.375, 0))"
I would like to extract the numeric values contained within the parentheses.
Right now I am attempting to make a matrix Mx9, where M is the number of lines in the text file, and the 9 comes from the 3 elements of the three vectors. I try doing this using a regular expression and capture groups:
string = fileread('triangle_positions.txt')
expression = '(-?\d+\.?\d*),\s(-?\d+\.?\d*),\s(-?\d+\.?\d*)'
tokens = regexp(string, expression, 'tokens');
The result is a "cell" containing the values as strings. For a single line I get a "1x3 cell" where each cell contains the coordinates of the vector as strings.
How would you convert this into a regular matlab matrix?
Thanks in advance
Søren
0 Kommentare
Akzeptierte Antwort
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Data Type Conversion finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!