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Author: Gagniuc

sf.html

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+<script src="sf.js"></script>
+
+<script>
+
+    var A ='10.3,23.4,44.8,63.2,44.1,35.1,46.5,62.6,50.4,28.9,24.7';
+    var B ='18.8,43.1,52.2,45.5,46.8,46.6,67.9,66.3,70.4,62,39.7';
+
+    var M = sf(A, B, 33);
+
+    document.write('Signal A:'+A+'<br>');
+    document.write('Signal M:'+M+'<br>');
+    document.write('Signal B:'+B+'<br>');
+
+</script>

sf.js

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+// Spectral forecast for signals in Javascript
+// Author: Dr. Paul A. Gagniuc
+// Date:   01/02/2022
+
+function sf(A, B, d){
+
+    var tA = [];
+    var tB = [];
+    var M ='';
+
+    var tA = A.split(',');
+    var tB = B.split(',');
+
+    var maxA = Math.max.apply(null, tA);
+    var maxB = Math.max.apply(null, tB);
+    var max = Math.max(maxA, maxB);
+
+    for(var i=0; i<tA.length; i++) {
+        var v = ((d/maxA)*tA[i])+(((max-d)/maxB)*tB[i]);
+        M += v.toFixed(2);
+        if(i<tA.length-1){M += ','}
+    }
+
+    return M;
+}