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10 Nov 2008	fastsearch Search an element in the array, or the next smaller and greater Author: Valentin Kuklin	Franworth, Dru	I tried the following code in Matlab clear all x=randn(10000,1); tic for i=1:1000000 y=randn; g=find(abs(x-y)==min(abs(x-y))); end toc tic y=sort(x); for i=1:1000000 z=randn; qq=fastsearch(y,z,1); end toc ---------------------------------------------------------------------------------- This is the output: Elapsed time is 423.486252 seconds. Elapsed time is 357.878006 seconds. ----------------------------------------------------------------------------------- An improvement by 15%. Pretty impressive.
10 Nov 2008	fastsearch Search an element in the array, or the next smaller and greater Author: Valentin Kuklin	Franworth, Dru	There is a slight bug in your code. In line 134 , you should have index=fastsearch_indeed(array,von,m1-1,wert,bias); Instead, you have fastsearch(array,von,m1-1,wert,bias); Same thing for line 136. Basically, all you have to do is replace fastsearch in lines 134 and 136 with fastsearch_indeed.
09 Nov 2008	fastsearch Search an element in the array, or the next smaller and greater Author: Valentin Kuklin	Franworth, Dru	I tried the following code and got an error message. As you can see, the number I am searching for is inside the sorted vector but it is generating an error message. ----------------------------------------------------------------------------------- >> x=randn(10000,1); >> y=sort(x); >> z=randn; >> fastsearch(y,z,1) ??? Error using ==> fastsearch Too many input arguments. Error in ==> fastsearch>fastsearch_indeed at 137 index=fastsearch(array,m2+1,bis,wert,bias); Error in ==> fastsearch at 59 index = fastsearch_indeed(array,1,length(array),wert,bias); >> z z = 0.4291 >> min(y) ans = -3.5758 >> max(y) ans = 4.0050 >> find(abs(y-z)==min(abs(y-z))) ans = 6694
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