Matching regular expression only at beginning of line in MATLAB
I have a string that spans multiple lines. The line breaks are LF, as in this example of "hello world" that has a line break between "hello" and "world": some_bytes = [104 101 108 108 111 10 119 111 114 108 100]; some_string = char(some_bytes); disp(some_string) I want to match the sequence "wo", but only if it occurs at the beginning of a line. But using the regular expression idx = regexpi(some_string,'^wo'); returns an empty array. What am I doing wrong?
^, by default, matches only at the beginning of the string. You can activate multiline mode by using the (?m) search flag: idx = regexpi(some_string,'(?m)^wo'); Alternatively, you can supply the option 'lineanchors'. See the documentation.
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