regexp help
显示 更早的评论
Hi, im trying to read in some numbers from some HTML:
'<br>1,020.32 mb<br>'
Im currently using regexp(string,'\d+','match'), how can i read in a number such as the one above that has a comma and a decimal point?
1 个评论
For developing and checking regular expressions here is an interactive helper:
采纳的回答
Walter Roberson
2012-4-4
regexp(string, '(\d+,)*\d+(\.\d*)?', 'match')
The above is flexible enough to support any number of leading groups of digits and commas (including no leading groups). It is also flexible enough to support the possibility that the decimal point and following digits are not present -- so it supports the equivalent of your \d+ (plain integers without commas or decimal points). Furthermore it supports a trailing decimal point with no digits afterwards.
5 个评论
Edward
2012-4-4
Ashish Uthama
2012-4-5
Edward, this might help you get started: http://www.mathworks.com/help/techdoc/matlab_prog/f0-42649.html#f0-42723
Breakdown:
(\d+,) -- One or more digit(s) followed by a comma
* -- zero or more instances of stuff within ()
\d+ -- One or more digit(s)
(\.\d*)-- A . (the \ is to 'escape it' since just using a . has a different meaning) followed by zero or more digit(s)
? -- zero or one instance of the stuff within ()
Walter Roberson
2015-2-28
Evangelos Stefanidis
2021-6-11
In my case I had the following string and I was interested in getting the number between -....mVPower-. That was my coding:
Sting='2021-06-08-Blank5-D150mm-R0mm-7LPM-0N2Shild-12.6mVPower-105ns-25ns-G600-C580-2Acc-60xInt-4VBins-slit10u-100Frames-NoIcorr-Polar-NoFilter.spe'
pattern1='(?<=\-)(\d+,)*\d+(\.\d*)?(?=mVPower\-)';
power=str2double(regexp(fname,pattern1,'match'));
S = '2021-06-08-Blank5-D150mm-R0mm-7LPM-0N2Shild-12.6mVPower-105ns-25ns-G600-C580-2Acc-60xInt-4VBins-slit10u-100Frames-NoIcorr-Polar-NoFilter.spe';
P = str2double(regexp(S,'\d+\.?\d*(?=mVPower)','match','once'))
更多回答（0 个）
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 
