[scilab-Users] Matlab ismember

Mon Jan 17 17:50:38 CET 2011

Thank you very much

--- On Mon, 1/17/11, Michaël Baudin <michael.baudin at scilab.org> wrote:

From: Michaël Baudin <michael.baudin at scilab.org>
Subject: Re: [scilab-Users] Matlab ismember
To: users at lists.scilab.org
Cc: "dragomir nedeltchev" <dnedelchev65 at yahoo.com>
Date: Monday, January 17, 2011, 5:30 PM


  Oups, this is the good one :

    
    http://bugzilla.scilab.org/show_bug.cgi?id=8792

    
    Michaël

    
    Le 17/01/2011 16:26, Michaël Baudin a écrit :
    

      See the discussion at :

      
      http://bugzilla.scilab.org/process_bug.cgi

      
      Best regards,

      
      Michaël Baudin

      
      Le 17/01/2011 16:10, Michaël Baudin a écrit :
      

        Hi,

        
        Ok, now I remember, it is there :

        
        http://forge.scilab.org/index.php/p/number/source/tree/HEAD/macros/number_ismember.sci

        
        Unfortunately, I have not released this function in the binary
        release yet.

        Here is a simplified version:

        
        function tf = number_ismember ( a , s )

            // Array elements that are members of set.

            //

            // Calling Sequence

            // tf = number_ismember ( a , s )

            //

            // Parameters

            // a : a ma-by-na matrix

            // s : a 1-by-ns matrix

            // tf : a ma-by-na matrix of booleans, tf(i,j) is %t if
        there is an entry in s matching a(i,j).

            //

            // Description

            // Search in a the entries which are in s.

            // 

            // Uses vectorized statements, based on the Kronecker
        product. 

            // The intermediate memory required is ma*na*ns.

            // 

            // Examples

            // a = (1:5)'

            // s = [0 2 4 6 8 10 12 14 16 18 20]

            // tf = number_ismember ( a , s )

            // expected = [%f %t %f %t %f]'

            //

            // // An example with a matrix

            // a = [

            // 7 35 14 86 76   

            // 15 51 24 96 49   

            // 35 40 46 35 93   

            // 85 34 74 82 22

            // ];

            // s = [51 74 22 15 86] 

            // tf = number_ismember(a, s)

            //

            // Authors

            // Copyright (C) 2010 - DIGITEO - Michael Baudin

        
            //

            // Check size

            // a can have any shape

            if ( s==[] ) then

              tf=(ones(a)==zeros(a))

              return

            end

            //

            // Check content

            // Nothing to do.

            //

            // Proceed...

            if ( a==[] ) then

              tf=[]

              return

            end

            //

            // Convert a into a column vector

            ma = size(a,"r")

            na = size(a,"c")

            a=a(:)

            //

            ns = size(s,"c")

            sp = s .*. ones(na*ma,1)

            ap = a .*. ones(1,ns)

            tf = or(ap==sp,"c")

            //

            // Convert tf into the same shape as a

            tf=matrix(tf,ma,na)

        endfunction

        
        This is an example:

        
        -->     a = [

        -->     7 35 14 86 76   

        -->     15 51 24 96 49   

        -->     35 40 46 35 93   

        -->     85 34 74 82 22

        -->     ];

         
        -->     s = [51 74 22 15 86] 

         s  =

         
            51.    74.    22.    15.    86.  

         
        -->     tf = number_ismember(a, s)

         tf  =

         
          F F F T F  

          T T F F F  

          F F F F F  

          F F T F T  

        
        Best regards,

        
        Michaël

        
        Le 16/01/2011 19:56, dragomir nedeltchev a écrit :
        
          
                thank you very
                  much

                  
                  --- On Sun, 1/16/11, Samuel Gougeon <Samuel.Gougeon at univ-lemans.fr>
                  wrote:

                  
                    From: Samuel Gougeon <Samuel.Gougeon at univ-lemans.fr>

                    Subject: Re: [scilab-Users] Matlab ismember

                    To: users at lists.scilab.org

                    Date: Sunday, January 16, 2011, 6:21 PM

                    
                      Hello,

                      
                      dragomir nedeltchev <dnedelchev65 at yahoo.com>


                      a écrit :

                      
                      > Hi, Can you help me replicate MATLAB's
                      ismember in SciLab? Thanks. Drago

                      
                      You may read the followinf thread:

                      http://lists.scilab.org/cgi-bin/ezmlm-browse?list=users&cmd=threadindex&month=200911&threadid=epdldcdicfagcdofccbc

                      
                      When you have well defined keywords as here, you
                      should use them to search

                      through the archives:

                      http://lists.scilab.org/cgi-bin/ezmlm-browse?list=users&cmd=search

                      
                      Regards

                      Samuel

                      
        -- 
Michaël Baudin
Ingénieur de développement
michael.baudin at scilab.org
-------------------------
Consortium Scilab - Digiteo
Domaine de Voluceau - Rocquencourt
B.P. 105 - 78153 Le Chesnay Cedex
Tel. : 01 39 63 56 87 - Fax : 01 39 63 55 94


      -- 
Michaël Baudin
Ingénieur de développement
michael.baudin at scilab.org
-------------------------
Consortium Scilab - Digiteo
Domaine de Voluceau - Rocquencourt
B.P. 105 - 78153 Le Chesnay Cedex
Tel. : 01 39 63 56 87 - Fax : 01 39 63 55 94


    -- 
Michaël Baudin
Ingénieur de développement
michael.baudin at scilab.org
-------------------------
Consortium Scilab - Digiteo
Domaine de Voluceau - Rocquencourt
B.P. 105 - 78153 Le Chesnay Cedex
Tel. : 01 39 63 56 87 - Fax : 01 39 63 55 94


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