extract numbers from cells

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alessio tugnolo
alessio tugnolo 2021-6-11
评论： alessio tugnolo 2021-6-11
I have a cell array with n rows wich contains:
'Gain=2M'
'Gain=500k'
'Gain=20M'
....
I would extract only the number which is contained in each cell. How can I do that?

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回答（2 个）

Chunru
Chunru 2021-6-11
Ran in:
s={'Gain=2M'
'Gain=500k'
'Gain=20M'};
n = length(s);
g = zeros(n, 1);
for i=1:n
tmp = strrep(s{i}, 'Gain=', '');
g(i) = str2num(tmp(1:end-1));
switch tmp(end)
case 'M'
g(i)=g(i)*1e6;
case 'k'
g(i)=g(i)*1e3;
end
end
g
g = 3×1
2000000 500000 20000000
Stephen23
Stephen23 2021-6-11
Ran in:
Simply download my FEX submission SIP2NUM:
https://www.mathworks.com/matlabcentral/fileexchange/53886-scientific-prefix-to-number
and use it like this:
C = {'Gain=2M';'Gain=500k';'Gain=20M'};
V = cellfun(@sip2num,C)
V = 3×1
2000000 500000 20000000

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