Converting a text file into strings and integers

2 次查看（过去 30 天）
Paolo Binetti
Paolo Binetti 2016-12-19
评论： Paolo Binetti 2016-12-21
I have .txt input files with a very simple structure, of which I attach an example. I want to convert its content in strings and integers. My code below works, but I was wondering if there is a faster option than "textread", which seems to be the weak point.
[pattern, text, d] = textread('dataset.txt', '%s %s %d');
pattern = cell2mat(pattern(1));
text = cell2mat(text(1));
  2 个评论
Paolo Binetti
Paolo Binetti 2016-12-19
BTW, I read in Mathworks documentation: http://www.mathworks.com/help/matlab/ref/textread.html?searchHighlight=textread&s_tid=doc_srchtitle
that textread is not recommended, but it does not say why and textscan does not seem to work in the same way. I have actually tried implementing textscan but I did not figure it out. Amazing how much time one can lose with I/O ...

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2016-12-19
Is there only the one set of values for each file? If so then probably a few fscanf() would be faster.
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2016-12-20
fid = fopen('dataset.txt');
pattern = fscanf(fid, '%s', 1);
txt = fscanf(fid, '%s', 1);
d = fscanf(fid, '%f', 1);
fclose(fid);
Paolo Binetti
Paolo Binetti 2016-12-21
Thank you: 5 times faster on my sample, noticeably faster on larger files, no longer the slowest piece of code in my algorithm.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Text Data Preparation 的更多信息

标签

尚未输入任何标签。

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by