MATLAB 中的正则表达式允许负整数
MATLAB 中的正则表达式是否将其取为负整数，例如“-1”。由于此错误“索引超出矩阵尺寸。”，我的代码似乎运行良好，并且我知道它与我的数据文件中的负值有关。它在工作区窗口中显示负整数。
关于如何在正则表达式中允许负整数的任何想法
这是代码：
m = regexp(value, 'START=(\d+)', 'tokens');
m2 = regexp(value, 'STOP=(\d+)', 'tokens');
start = cell2mat(m{1});
stop = cell2mat(m2{1});
% Print result
fprintf(fout, 'INSERT INTO cath_domains (pdbcode, cathbegin, cathend) VALUES("%s", %s, %s)\n', domain, start, stop);
Does regular expressions in MATLAB take it a negative integer, such as "-1". My code doesn't seem to run well due to this error "Index exceeds matrix dimensions." and i know it has something to do with the negative values in my data file. It shows the negative integer in the workspace window.
Any ideas as to how i can allow negative integers in my regular expression
Here's the code:
m = regexp(value, 'START=(\d+)', 'tokens');
m2 = regexp(value, 'STOP=(\d+)', 'tokens');
start = cell2mat(m{1});
stop = cell2mat(m2{1});
% Print result
fprintf(fout, 'INSERT INTO cath_domains (pdbcode, cathbegin, cathend) VALUES("%s", %s, %s)\n', domain, start, stop);
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(\d+)将仅返回数字，而不返回减号等字符。因此，如果有减号，则没有匹配项，m和/或m2为空，因此当您尝试索引时会收到错误元胞数组。请尝试
改为，这允许使用可选的减号。
The token
(\d+)will only return numbers, not characters like the minus sign. Thus, if there is a minus sign, there is no match,mand/orm2are empty, and thus you're getting an error when you try to index into the cell arrays.Try
instead, which allows for an optional minus sign.