read a particular string from a line in text file
3 ビュー (過去 30 日間)
古いコメントを表示
Lets say I have two lines in a text file like this:
The value of the number is 240.56 units.
The value of the number is 140.43 units.
I want to read only the values (240.56 and 140.43) from those lines. However there are many such lines in the similar format inside the text file. So i can't go by comparing string value and then read that value. How to read those dynamic values which are located in a sentence at a particular position. Any ideas ?
0 件のコメント
採用された回答
Tom Wright
2015 年 9 月 2 日
Sounds like a regular expression is the way to go.
fid = fopen('YourFile.txt','rt');
expression = '([\d.]+)' % matches one or more digits and .
% a more advanced expression is (\d+(?:\.\d*)?|\.\d+)
while true
thisline = fgetl(fid);
value = regexp(thisline,exp,'match'); % perform the regular expression
value = value(0);
end
0 件のコメント
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Characters and Strings についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!