Hi everybody

Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.


function [output]=searchvec(vec,key)

len=length(vec);

%index=[];

i=1;
while i < len %&& vec(i)~=key
    i=i+1;

if vec(i)==key
    index(i)={i};

end

end

output=cell2mat(index);


Best Regards

Hans

"Hans " <jyde_6@msn.com> wrote in message <hhfenf$j31$1@fred.mathworks.com>...
> Hi everybody
> 
> Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
> As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.

one of the many solutions

     v=[2,3,15,8,8,0,1,15];
     k=[8,15];
     r=find(ismember(v,k))
%    r = 3 4 5 8

us

"Hans " <jyde_6@msn.com> wrote in message <hhfenf$j31$1@fred.mathworks.com>...
> Hi everybody
> 
> Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
> As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.
> 

help ismember

HTH,
John

"John D'Errico" <woodchips@rochester.rr.com> wrote in message <hhffr3$sd2$1@fred.mathworks.com>...
> "Hans " <jyde_6@msn.com> wrote in message <hhfenf$j31$1@fred.mathworks.com>...
> > Hi everybody
> > 
> > Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
> > As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.
> > 
> 
> help ismember
> 
> HTH,
> John

Dear John

I have found a solution.

function [output]=smartseqsearch(vec,key)

len=length(vec);

%index=[];

i=1;
 
while i < len %&& vec(i)~=key
    i=i+1;

for j=1:length(key)   
if vec(i)==key(j)
    index(i)={i};

end
end
end

output=cell2mat(index);


I will look at the function ismember to see if I can optimise my code.

Best Regards 

Hans

"us " <us@neurol.unizh.ch> wrote in message <hhffp7$ot9$1@fred.mathworks.com>...
> "Hans " <jyde_6@msn.com> wrote in message <hhfenf$j31$1@fred.mathworks.com>...
> > Hi everybody
> > 
> > Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
> > As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.
> 
> one of the many solutions
> 
>      v=[2,3,15,8,8,0,1,15];
>      k=[8,15];
>      r=find(ismember(v,k))
> %    r = 3 4 5 8
> 
> us


Thank you very much US. I will try the ismember and use the tic toc to see what is fastest.

Best Regards 

Hans

"Hans " <jyde_6@msn.com> wrote in message <hhfgfm$93o$1@fred.mathworks.com>...
> "us " <us@neurol.unizh.ch> wrote in message <hhffp7$ot9$1@fred.mathworks.com>...
> > "Hans " <jyde_6@msn.com> wrote in message <hhfenf$j31$1@fred.mathworks.com>...
> > > Hi everybody
> > > 
> > > Under I have copied the code for the function searchvec that search through a vector vec to find the value key.
> > > As an example vec=[15 10 7 8 98 8 3 8] and key=8. The function returns [4 6 8]. What I want is that key should be a vector instead of a scalar. As example vec=[15 10 7 8 98 8 3 8] and key=[15 8]. The function should return [1 4 6 8]. How can I change the function file. It must be a function.
> > 
> > one of the many solutions
> > 
> >      v=[2,3,15,8,8,0,1,15];
> >      k=[8,15];
> >      r=find(ismember(v,k))
> > %    r = 3 4 5 8
> > 
> > us
> 
> 
> Thank you very much US. I will try the ismember and use the tic toc to see what is fastest.
> 
> Best Regards 
> 
> Hans

Dear John and US.

What if it was a cellarray it has to search through and find some values?How would the code looklike?

Best Regards

Hans

"Hans "
> Dear John and US.
> 
> What if it was a cellarray it has to search through and find some values?How would the code looklike?
> 
> Best Regards
> 
> Hans

one of the solutions

     v=num2cell([2,3,15,8,8,0,1,15]);     % a CELL
     k=[8,15];
     r=find(ismember([v{:}],k))
%    r = same result as above...

us