fix bugs in embeddings input tensor shape and emomusic angle calculation

Author: jmarcosfer

examples/demos/mood-classifiers/src/EffnetEmbeddings.js

@@ -55,8 +55,9 @@ export default class EffnetMusicnnEmbeddings {
     for (let f=0; f < melspectrogram.length; f++) {
       const melbandsFrame = melspectrogram[f];
       for (let b=0; b < melbandsFrame.length; b++) {
+        const offset = f * this.numMelBands;
         const bandValue = melbandsFrame[b]
-        flattenedMelspectrogram[f+b] = bandValue;
+        flattenedMelspectrogram[offset+b] = bandValue;
       }
     }
 

examples/demos/mood-classifiers/src/pointToEmoji.js

@@ -41,7 +41,8 @@ export function pointToEmoji(x, y) {
     return img;
   }
 
-  const angle = 360 + (Math.atan2(y-centerVal, x-centerVal) * 180/Math.PI); // in degrees
+  let angle = Math.atan2(y-centerVal, x-centerVal) * 180/Math.PI; // in degrees
+  if (angle < 0) angle += 360;
   const clockPos = Math.floor(angle/30);
   img.src = emojis[clockPos]
   return img;