[Scilab-users] vectoriztion and sets of data

[Adrien Vogt-Schilb]

Hi again

I am still not sure, but look at the output of

A=rand(8,6)

B=zeros(8,6)

D = A > B

D = bool2s (A > B)

This might give you insight on how to solve your problem
tell me if not

On 22/11/2012 16:06, Paul Carrico wrote:
>
> The original code looked like ... I'm trying to optimized it (ok for 
> the "if", but how to combine a set of data and vectorization (??? Many 
> trials but I failed)
>
> /// initial matrix/
>
> A=rand(8,6);
>
> B=zeros(8,6);
>
> C=[A;A;B;A;B;B;A];
>
> [nr,nc]=size(C);
>
> /// original code looks like/
>
> D=zeros((nr/8),1);
>
> fori=1:(nr/8)
>
> search=max(abs(C((8*(i-1)+1):(8*i),:)));
>
> if(search>0)then
>
> D(i,1)=1;
>
> else
>
> D(i,1)=0;
>
> end
>
> end
>
> *De :*users-bounces at lists.scilab.org 
> [mailto:users-bounces at lists.scilab.org] *De la part de* Adrien Vogt-Schilb
> *Envoyé :* jeudi 22 novembre 2012 15:54
> *À :* International users mailing list for Scilab.
> *Objet :* Re: [Scilab-users] vectoriztion and sets of data
>
> On 22/11/2012 15:48, Paul Carrico wrote:
>
>     Dear All,
>
>     On the above example, it should be possible to select a sets of
>     rows, should not ? if so how please ?
>
>     Thanks
>
>     Paul
>
>
> Hi
>
> Didn't understand your question, have a look at this:
>
> A=[1:10]'*2
>
> rows = [1;6;2]
>
> B=zeros(A)
>
> B(rows) = A(rows)
>
>
> hope this helps
>
>
> ###################################################
>
> mode(0)
>   
> /// initial matrix/
> A  =  rand(8,6);
> B  =  zeros(8,6);
> C  =  [A  ;  A;  B;  A;  B;  B;  A];
> [nr,nc]  =  size(C);
>   
> /// each set of 8 rows is analysed/
> Search  =  zeros((nr/8),1);
> ///i = ones((nr/8),1).* 1;/
> i  =  [1:(nr/8)]';
> /// Search = max(abs(C((8*(i - 1) + 1):(8 * i),:)));/
> Search  =  max(abs(C([i.  *  8  -  7  :i.  *  8],:)))
> ;
> B  =  (find(Search  ==  0))';
>   
> D  =  zeros((nr/8),1);
> D(B,2)  =  1;
>
>
>
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org  <mailto:users at lists.scilab.org>
> http://lists.scilab.org/mailman/listinfo/users
>
>
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20121122/78dc04c9/attachment.htm>