Data commit

Task/Matrix-transposition/Jsish/matrix-transposition-1.jsish

@@ -0,0 +1,59 @@
+/* Matrix transposition, multiplication, identity, and exponentiation, in Jsish */
+function Matrix(ary) {
+    this.mtx = ary;
+    this.height = ary.length;
+    this.width = ary[0].length;
+}
+
+Matrix.prototype.toString = function() {
+    var s = [];
+    for (var i = 0; i < this.mtx.length; i++) s.push(this.mtx[i].join(","));
+    return s.join("\n");
+};
+
+// returns a transposed matrix
+Matrix.prototype.transpose = function() {
+    var transposed = [];
+    for (var i = 0; i < this.width; i++) {
+        transposed[i] = [];
+        for (var j = 0; j < this.height; j++) transposed[i][j] = this.mtx[j][i];
+    }
+    return new Matrix(transposed);
+};
+
+// returns a matrix as the product of two others
+Matrix.prototype.mult = function(other) {
+    if (this.width != other.height) throw "error: incompatible sizes";
+
+    var result = [];
+    for (var i = 0; i < this.height; i++) {
+        result[i] = [];
+        for (var j = 0; j < other.width; j++) {
+            var sum = 0;
+            for (var k = 0; k < this.width; k++) sum += this.mtx[i][k] * other.mtx[k][j];
+            result[i][j] = sum;
+        }
+    }
+    return new Matrix(result);
+};
+
+// IdentityMatrix is a "subclass" of Matrix
+function IdentityMatrix(n) {
+    this.height = n;
+    this.width = n;
+    this.mtx = [];
+    for (var i = 0; i < n; i++) {
+        this.mtx[i] = [];
+        for (var j = 0; j < n; j++) this.mtx[i][j] = (i == j ? 1 : 0);
+    }
+}
+IdentityMatrix.prototype = Matrix.prototype;
+
+// the Matrix exponentiation function
+Matrix.prototype.exp = function(n) {
+    var result = new IdentityMatrix(this.height);
+    for (var i = 1; i <= n; i++) result = result.mult(this);
+    return result;
+};
+
+provide('Matrix', '0.60');

Task/Matrix-transposition/Jsish/matrix-transposition-2.jsish

@@ -0,0 +1,15 @@
+/* Matrix transposition, in Jsish */
+require('Matrix');
+
+if (Interp.conf('unitTest')) {
+    var m = new Matrix([[1,1,1,1],[2,4,8,16],[3,9,27,81],[4,16,64,256],[5,25,125,625]]);
+;    m;
+;    m.transpose();
+}
+
+/*
+=!EXPECTSTART!=
+m ==> { height:5, mtx:[ [ 1, 1, 1, 1 ], [ 2, 4, 8, 16 ], [ 3, 9, 27, 81 ], [ 4, 16, 64, 256 ], [ 5, 25, 125, 625 ] ], width:4 }
+m.transpose() ==> { height:4, mtx:[ [ 1, 2, 3, 4, 5 ], [ 1, 4, 9, 16, 25 ], [ 1, 8, 27, 64, 125 ], [ 1, 16, 81, 256, 625 ] ], width:5 }
+=!EXPECTEND!=
+*/