Help on regular expressions

Question

Patrick Mboma 2014-11-23

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关闭： MATLAB Answer Bot 2021-8-20

Hi all,

I would like to extract parts of a string. In particular, I would like to extract all elements between two limits LIM> and LIM2>. For instance, if I have

LIM>ab + cd = 0LIM2>, the results should be 'ab + cd = 0'

The string is very long and there are may such instances in it. Ideally I would like to capture those parts directly as equations, but even a cell array will do.

can anyone help?

Thanks

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Answer 1

the cyclist 2014-11-23

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在 MATLAB Online 中打开

s = 'LIM>ab + cd = 0LIM2> and then here it is again LIM>ef + gh = 0LIM2> and perhaps a bit more';
limIndices = regexp(s,'LIM');
numberInstances = numel(limIndices)/2;
equationCell = cell(numberInstances,1);
for ni = 1:numberInstances
    startIndex = limIndices(2*ni-1) + 4;
    endIndex   = limIndices(2*ni) - 1;
    equationCell{ni} = s(startIndex:endIndex);
end