code: function Model(inputMatrix, rowLabels, colLabels) {
  	this.rowLabels = rowLabels;	// labels for the rows
  	this.colLabels = colLabels; // labels for the columns
  	this.input = inputMatrix;	// input data
  	
  	// estimated data, initialized to all zeros
  	this.estimated = sylvester.Matrix.Zeros(this.input.rows(),this.input.cols());
  }
docs: Model representation object. Contains both input and estimated values.