Creating Array of Array of Array of Variables (Migrated from community.research.microsoft.com)

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  minka replied on 03-10-2011 7:38 AM

  Here is an example of building a 3-deep jagged array:

                    double boolsPrior = 0.3;

                    Range outer = new Range(2).Named("outer");

                    VariableArray<int> middleSizes = Variable.Constant(new int[] { 2, 3 }, outer).Named("middleSizes");

                    Range middle = new Range(middleSizes[outer]).Named("middle");

                    var innerSizes = Variable.Constant(new int[][] {

                          new int[] { 1, 2 }, new int[] { 1,2,3 }

                    }, outer, middle).Named("innerSizes");

                    Range inner = new Range(innerSizes[outer][middle]).Named("inner");

                    var bools = Variable.Array<bool>(Variable.Array<bool>(Variable.Array<bool>(inner), middle), outer).Named("bools");

                    using (Variable.ForEach(outer)) {

                          using (Variable.ForEach(middle)) {

                                using (Variable.ForEach(inner)) {

                                      bools[outer][middle][inner] = Variable.Bernoulli(boolsPrior);

                                }

                          }

                    }

   

  Note the last line could be equivalently written without the using statements: 

      bools[outer][middle][inner] = Variable.Bernoulli(boolsPrior).ForEach(outer,middle,inner);

  Friday, June 3, 2011 6:31 PM
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  akuzmenko replied on 03-10-2011 9:55 AM

  Great, thanks Tom.

  However, the shorter alternative (where you set all variables in one line) throws NotImplementedException. The longer version with three ForEach'es works ok.

  • Marked as answer by Microsoft Research Friday, June 3, 2011 6:31 PM

  Friday, June 3, 2011 6:31 PM
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  The above code doesn't work in Infer.NET 2.5 Beta 2.  Instead, use this:

              double boolsPrior = 0.3;
              Range outer = new Range(2).Named("outer");
              VariableArray<int> middleSizes = Variable.Constant(new int[] { 2, 3 }, outer).Named("middleSizes");
              Range middle = new Range(middleSizes[outer]).Named("middle");
              var innerSizes = Variable.Constant(new int[][] { 
                          new int[] { 1, 2 }, new int[] { 1,2,3 }
                    }, outer, middle).Named("innerSizes");
              Range inner = new Range(innerSizes[outer][middle]).Named("inner");
              var bools = Variable.Array(Variable.Array(Variable.Array<bool>(inner), middle), outer).Named("bools");
              bools[outer][middle][inner] = Variable.Bernoulli(boolsPrior).ForEach(outer,middle,inner);
  

  
  

  Friday, October 10, 2014 12:09 PM

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