ector[Double]"></a><a id="sum(Seq[Vector[Double]],Vector[Double]):Vector[Double]"></a> <span class="permalink"><a href="../../provingground/learning/WeightVect$.html#sum(vs:Seq[Vector[Double]],accum:Vector[Double]):Vector[Double]" title="Permalink"><i class="material-icons"></i></a></span> <span class="modifier_kind"><span class="modifier"></span> <span class="kind">def</span></span> <span class="symbol"><span class="name">sum</span><span class="params">(<span name="vs">vs: <a href="../../scala/index.htm