case insensitive strfind?
显示 更早的评论
I have a matrix in which there are about 100,000 sentences that I want to scan for the existence of certain words (True/false). For previous scans, searching for one exact word, I used the strfind. Nevertheless, now I have a list of 18 words which might be written in lower or upper cases in the sequences. The strcmpi which could be useful in this case only returns positive if the whole sentence consist of the word... Is there another function I missed?
Thank you
采纳的回答
Titus Edelhofer
2011-7-24
6 个投票
Hi,
one simple method would be to use lower on both the sentences and the words you are using ...
Titus
1 个评论
Tord Bjørnevaagen
2017-8-11
I just used this solution, thanks!
strfind(lower(bigText),lower(keyword))
更多回答（2 个）
Fangjun Jiang
2011-7-24
1 个投票
use regexpi
1 个评论
Turner
2013-8-20
takes 10 times longer than lower/upper followed by strfind() in my benchmark
Bjorn Gustavsson
2011-7-24
0 个投票
Use: strcmpi
2 个评论
Walter Roberson
2011-7-25
strcmpi() is not suitable for substring searches. See http://www.mathworks.com/help/techdoc/ref/strcmpi.html about what it _does_ do.
Bjorn Gustavsson
2011-7-25
I misread the original poster's strfind as strcmp...
类别
在 帮助中心 和 File Exchange 中查找有关 Characters and Strings 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
