First Commit

Vector.js

@@ -0,0 +1,47 @@
+function random() {
+	let seed = 12345; // fixed seed
+
+	return function() {
+		seed = ( seed * 16807 ) % 2147483647;
+		return ( seed - 1 ) / 2147483646;
+	};
+}
+
+const randomFix = random();
+
+export default class Vector {
+	
+	constructor( length, fillValue = 0 ) {
+		this.data   = new Array( length );
+		for ( let i = 0 ; i < length ; i++ ) {
+			this.data[ i ] = fillValue;
+		}
+	}
+
+	get length() {
+		return this.data.length;
+	}
+
+	static dot( a, b ) {
+		let sum = 0;
+		for ( let i = 0 ; i < a.length ; i++ ) {
+			sum += a.data[ i ] * b.data[ i ];
+		}
+		return sum;
+	}
+
+	static softmax( vec ) {
+		const max = Math.max( ...vec.data );
+		const exps = new Array( vec.length );
+		let sum = 0;
+		for ( let i = 0 ; i < vec.length ; i++ ) {
+			exps[ i ] = Math.exp( vec.data[ i ] - max );
+			sum += exps[ i ];
+		}
+		const result = new Vector( vec.length );
+		for ( let i = 0 ; i < vec.length ; i++ ) {
+			result.data[ i ] = exps[ i ] / sum;
+		}
+		return result;
+	}
+}