Fix prediction result aggregation

src/app/prediction/prediction.component.ts

@@ -126,13 +126,24 @@ export class PredictionComponent implements OnInit {
     this.result = undefined;
   }
 
+  // Aggregates spectrum names and prediction values into an associative array
+  prepareExport() {
+    const zip = (a, b) => a.map((k, i) => [k, b[i]]);
+    const values = this.result.predictions
+      .map(prediction => prediction
+           .filter(field => field.category === 'Prediction')
+           .map(field => field.value));
+    return zip(this.spectrumNames, values);
+  }
+
+  // Converts the prediction results to a CSV file
   exportCSV() {
-    const zip = (a, b) => a.map((k, i) => [k, b[i]]); 
-    const predictions = zip(this.spectrumNames, this.result.predictions.map(p => p[0].value));
+    const predictions = this.prepareExport();
     const csv = predictions.map(line => line.join(";")).join("\n");
     FileSaver.saveAs(new Blob([csv], { type: 'text/csv;charset=utf-8' }), "predictions.csv");
   }
 
+  // Converts the prediction results to a PDF file
   exportPDF() {
     // TODO: Generate PDF export
   }