Using regexp in a repetitive manner
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Hi,
Given the following string:
[Some text]
type="line" coords="461,461,461,487,461,487,461,489,462,490,462,492,463,493,464,494,465,495,467,495,468,496,470,496,470,496,801,496,801,496,803,496"
[Some text]
type="line" coords="461,487,461,489,462,490,462,492,463,493,496"
How can we obtain the numbers using regexp function of MATLAB? Please note that the length of numbers in the string is variable, therefore, a " universal" expression is needed here.
Thanks in advance,
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Accepted Answer
Guillaume
on 4 Dec 2015
Edited: Walter Roberson
on 4 Dec 2015
If you want the numbers from all the lines just as a vector and assuming there are no unwanted numbers in any other line then it's simply:
str = sprintf('%s\n%s\n%s\n%s\n', ...
'[Some text]', ...
'type="line" coords="461,461,461,487,461,487,461,489,462,490,462,492,463,493,464,494,465,495,467,495,468,496,470,496,470,496,801,496,801,496,803,496"', ...
'bla bla bla', ...
'type="line" coords="461,487,461,489,462,490,462,492,463,493,496"');
numbers = str2double(regexp(str, '\d+', 'match'))
if you want something more complicated (such as a cell array of vectors one per line or just the number after coords="), then clarify
4 Comments
Guillaume
on 4 Dec 2015
Edited: Guillaume
on 4 Dec 2015
If the numbers have to be enclosed within the coords quotes, then you need a minimum of two regexp:
coordsegments = regexp(str, '(?<=coords=")[^"]*', 'match');
coords = regexp(coordsegments', '\d+', 'match')
coordvalues = cellfun(@str2double, coords, 'UniformOutput', false)
More Answers (1)
Thorsten
on 4 Dec 2015
Edited: Thorsten
on 4 Dec 2015
line = 'type="line" coords="461,461,461,487,461,487,461,489,462,490,462,492,463,493,464,494,465,495,467,495,468,496,470,496,470,496,801,496,801,496,803,496"'
data = sscanf(strrep(line, 'type="line" coords="', ''), '%d,');
line = 'type="line" coords="461,487,461,489,462,490,462,492,463,493,496"';
data = sscanf(strrep(line, 'type="line" coords="', ''), '%d,');
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