Fix implementation to properly handle NaN as first value edge case

kgryte · kgryte · commit b067f2fcf6b6 · 2018-06-08T17:31:45.000-07:00
diff --git a/lib/node_modules/@stdlib/stats/incr/mda/lib/main.js b/lib/node_modules/@stdlib/stats/incr/mda/lib/main.js
@@ -70,14 +70,13 @@ function incrmda() {
 		if ( arguments.length === 0 ) {
 			return mean();
 		}
-		if ( FLG ) {
-			sf = signum( f-f0 );
-			sa = signum( a-a0 );
-		} else {
+		if ( FLG === void 0 ) {
 			FLG = true;
-			sf = 1.0;
-			sa = 1.0;
+			f0 = f;
+			a0 = a;
 		}
+		sf = signum( f-f0 );
+		sa = signum( a-a0 );
 		f0 = f;
 		a0 = a;
 		return mean( kroneckerDelta( sf, sa ) );
