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15712729
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2013-03-29T22:59:24.227
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2013-03-29T22:59:24.227
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In your specific case a way to perform this with regular expressions would be: First you have to decide what strings are valid in your search for example: <pre><code>firstpar = 'First parameter is [0-9]+'; </code></pre> means that you are looking for a string 'First parameter is ' that ends with a sequence of digits. Then you could use <code>regexp</code> or <code>regexpi</code> in the following way: <pre><code>results = regexp(mystring, firstpar, 'match'); </code></pre> Where <code>mystring</code> is the text you perform the search on and <code>'match'</code> means that you want parts of the text as output, not indexes. Now, <code>results</code> is a cell matrix with each cell containing a string that appeared in your text and fulfilled your <code>firstpar</code> definition. In order to extract just the numbers from cell matrix of strings you could use <code>regexp</code> again, but now helping yourself with <code>cellfun</code>, which iteratively applies your command to all cells of a cell matrix: <pre><code>numbers = cellfun(@(x) str2num(regexp(x, '[0-9]+', 'match', 'once')), results); </code></pre> <code>numbers</code> is an array of numbers that you were looking for. You can do the same for different string patterns - if you want to have a more general string definitions (instead of straightforward <code>firstpar</code> that we used here) read <a href="http://www.mathworks.com/help/matlab/ref/regexpi.html" rel="nofollow">matlab documentation about regular expressions</a> (alexcasalboni pasted it in his comment), scroll down to Input Arguments and expand 'expressions'. The difference between <code>regexp</code> and <code>regexpi</code> is that the latter is case insensitive.
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1. POreading via matlab a number after a specific string in a txt file
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1. USmmagnuski
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