ateTime]]):org.saddle.vec.VecTime"></a>
      <a id="concat(IndexedSeq[Vec[DateTime]]):VecTime"></a>
      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier"></span>
        <span class="kind">def</span>
      </span>
      <span class="symbol">
        <span class="name">concat</span><span class="params">(<span name="arr">arr: <span class="extype" name="scala.IndexedSeq">IndexedSeq</span>[<a href="../Vec.html" class="extype" name="org.saddle.Vec">Vec</a>[<span class="e