code: function aug(a, b) {
      var newarr = [];
      for (var i = 0; i < a.length; i++) {
        newarr.push(a[i].slice());
      }
      for (var i = 0; i < newarr.length; i++) {
        push.apply(newarr[i], b[i]);
      }
      return newarr;
    }
docs: augment one matrix by another Note: this function returns a matrix, not a jStat object