regexp string to numeric array

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Knut
Knut el 4 de Nov. de 2016
Respondida: Stephen23 el 20 de Abr. de 2023
I have what seems like a common problem: a series of strings containing numeric data mixed with text. I want to extract those numbers into vectors or arrays. I have come up with the mock-up below, but it feels like a cludge. Is there a simple, readable one-liner that does the same?
str = {'bob22alice666buster2', 'donald42lisa00buddy9'};
pat = '\w*(\d{2})\w*(\d{2,3})\w*(\d{1})';
for idx = 1:2
tmp = regexp(str{idx}, pat, 'tokens');
male(idx) = str2double(tmp{1}(1));
female(idx) = str2double(tmp{1}(2));
doggie(idx) = str2double(tmp{1}(3));
end
I was hoping for something ala:
for ...
Mx3arr = str2num(regexp(str{idx}, pat, 'tokens')');
end

Respuestas (2)

Jan
Jan el 4 de Nov. de 2016
Editada: Jan el 4 de Nov. de 2016
str = {'bob22alice666buster2', 'donald42lisa00buddy9'};
pat = '\w*(\d{2})\w*(\d{2,3})\w*(\d{1})';
tmp = regexp(str, pat, 'tokens');
C1 = cat(1, tmp{:});
C2 = cat(1, C1{:});
M = str2double(C2);
I still prefer the dull string parsing without regexp:
S = sprintf('%s ', str{:});
S(isstrprop(S, 'alpha')) = ' ';
M = sscanf(S, '%d', [3, inf]);
Although it looks less smart, it works without clutter and much faster.

Stephen23
Stephen23 el 20 de Abr. de 2023
Assuming that every string contains exactly the same number of numeric data:
str = {'bob22alice666buster2', 'donald42lisa00buddy9'};
tmp = regexp(str,'\d+','match');
mat = str2double(vertcat(tmp{:}))
mat = 2×3
22 666 2 42 0 9

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