Improving a search algorithm

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Natialol
Natialol 2013-3-26
Hello,
I would like suggestions on how to make the search below more efficient. I concatenate in another script to obtain numeric strings eg 0120001410. I then use the search function below to search for 0110001110 in row 1 obtain the corresponding value in row 2. Can I use logical indexing for this, if so, how.
function y= binge(x)
binge= [00000001, 00000010, 00000020, 00000021, .........,90000000;
0.11111, 2.4433, ..................................,7.2];
i=1;
length=size(binge,2);
while i<=length
if abs(x-binge(1,i))<10e-5
y=binge(2,i);
break;
end
i=i+1;
end
if (i>length)
error('wrong');
end
end
Thanks MN

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PT
PT 2013-3-26
function y = binge(x)
binge= [00000001, 00000010, 00000020, 00000021, .........,90000000;
0.11111, 2.4433, ..................................,7.2];
y = binge(2,binge(1,:) == x);
%or to use the same tolerance as you specified,
% y = binge(2,abs(x - binge(1,:)) < 1e-5);
  2 个评论
Natialol
Natialol 2013-3-29
Thanks PT, can I further improve the search?? The fitness function of which this search is a sub component still takes a very very long time.
Thanks
PT
PT 2013-4-1
If your table is sorted, you can use a more advanced algorithm. Have you Profiled the run?

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