[SOLVED] Dot Product

Answers

• veve Member Posts: 63 Contributor II

  July 2014

  I just saw that there is another thread "Matrix Multiplication" that is saying that you cannot...
  
  I'm still truggling to the R code ...

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• veve Member Posts: 63 Contributor II

  August 2014

  My final solution is using groovy:

  
  import com.rapidminer.tools.Ontology;
  
  //imports----------------------------------------------------------------------
  ExampleSet ASet = operator.getInput(ExampleSet.class, 0)  //(n x f)
  ExampleSet BSet = operator.getInput(ExampleSet.class, 1)  // (f x m) 
  ExampleSet resultSet = operator.getInput(ExampleSet.class, 2)  // (n x m)
  
  //init----------------------------------------------------------------------------
  Integer m = operator.getProcess().macroHandler.getMacro("m").toInteger();
  Integer n = operator.getProcess().macroHandler.getMacro("n").toInteger();
  Integer f =  operator.getProcess().macroHandler.getMacro("f").toInteger();
  Integer i = 0
  Integer j = 0
  Integer k = 0
  
  //save attributes name into array-------------------------------------------
  String[] ASetAttributes = new String;
  j = 0
  for (Attribute attribute : ASet.getAttributes()) {
  	ASetAttributes = attribute.getName();
  	j = j+1
  }
  
  String[] userSetAttributes = new String;
  j = 0
  for (Attribute attribute : BSet.getAttributes()) {
  	BSetAttributes = attribute.getName();
  	j = j+1
  }
  
  
  //table and exampleset------------------------------------------------------
  Integer a = 0i
  Integer b = 0i
  Integer c = 0i
  for (i = 0; i < (n-1); i++){
   for (j = 0; j < (m-1); j++) {	 	
     for(k = 0; k < (f-1); k++){ 	
     	 //resultant += a * b;
     	 AAtt = ASetAttributes.toString();
     	 BAtt = BSetAttributes.toString();
     	 resultAtt = BSetAttributes.toString();
     	 if(AAtt!="idA" && BAtt!="idB"){
  	 	a = (Integer)(ASet.getExample(i)[AAtt]);
  	 	b = (Integer)(BSet.getExample(k)[BAtt]);   
  	 	c = (Integer) (resultSet.getExample(i)[resultAtt])
  	 	resultSet.getExample(i)[resultAtt] = (Integer)(c+a*b); 
     	 }
     }
   }
  }
  return resultSet
  

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• veve Member Posts: 63 Contributor II

  August 2014

  Finally, I didn't used my solution, since is too slow
  I used python for that (wrote a csv file and python read-it and did the multiplication and wrote the output into another file)

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