/** It computes the average and standard deviation of the input attributes */ private void computeStatistics() { stdev = new double[this.getnVars()]; average = new double[this.getnVars()]; for (int i = 0; i < this.getnInputs(); i++) { average[i] = 0; for (int j = 0; j < X[i].length; j++) { average[i] += X[i][j]; } average[i] /= X[i].length; } average[average.length - 1] = 0; for (int j = 0; j < outputReal.length; j++) { average[average.length - 1] += outputReal[j]; } average[average.length - 1] /= outputReal.length; for (int i = 0; i < this.getnInputs(); i++) { double sum = 0; for (int j = 0; j < X[i].length; j++) { sum += (X[i][j] - average[i]) * (X[i][j] - average[i]); } sum /= X[i].length; stdev[i] = Math.sqrt(sum); } double sum = 0; for (int j = 0; j < outputReal.length; j++) { sum += (outputReal[j] - average[average.length - 1]) * (outputReal[j] - average[average.length - 1]); } sum /= outputReal.length; stdev[stdev.length - 1] = Math.sqrt(sum); }
/** It computes the average and standard deviation of the input attributes */ private void computeStatistics() { stdev = new double[this.getNvariables()]; average = new double[this.getNvariables()]; for (int i = 0; i < this.getnInputs(); i++) { average[i] = 0; for (int j = 0; j < this.getNdatos(); j++) { if (!this.isMissing(j, i)) { average[i] += X[j][i]; } } average[i] /= this.getNdatos(); } average[average.length - 1] = 0; for (int j = 0; j < outputReal.length; j++) { average[average.length - 1] += outputReal[j]; } average[average.length - 1] /= outputReal.length; for (int i = 0; i < this.getnInputs(); i++) { double sum = 0; for (int j = 0; j < this.getNdatos(); j++) { if (!this.isMissing(j, i)) { sum += (X[j][i] - average[i]) * (X[j][i] - average[i]); } } sum /= this.getNdatos(); stdev[i] = Math.sqrt(sum); } double sum = 0; for (int j = 0; j < outputReal.length; j++) { sum += (outputReal[j] - average[average.length - 1]) * (outputReal[j] - average[average.length - 1]); } sum /= outputReal.length; stdev[stdev.length - 1] = Math.sqrt(sum); }