You could download my FEX submission natsort:
And then import your file into a cell array of character vectors C:
C = regexp(fileread('new.txt'),'\S+','match');
D = natsort(C,'\d+\.?\d*'); % sort into the requested order.
Where D contains the sorted character vectors, which you can check:
>> D(:)
ans =
'0.0,A'
'0.10,D'
'0.10,F'
'0.10,H'
'0.10,J'
'0.10,O'
'0.10,Q'
'1.00,G'
'2.0,B'
'2.0,K'
'2.0,L'
'2.0,M'
'5.00,C'
'5.00,E'
'5.00,N'
'10.00,I'
'10.00,P'
If you want, save it to file:
[fid,msg] = fopen('out.txt','wt');
assert(fid>=3,msg)
fprintf('%s\n',D{:});
fclose(fid);
