s="dv">1</span><span class="op">:</span><span class="dv">9</span>)], 
  <span class="cf">function</span>(x) {
    x[x <span class="op">&lt;</span><span class="st"> </span><span class="dv">0</span>] &lt;-<span class="st"> </span><span class="ot">NA</span>
    x[x <span class="op">&gt;</span><span class="st"> </span><span class="dv">3</span>] &lt;-<span class="st"> </span><span class="ot">NA</span>
  })

<span class="co"># save cleaned T0 data --------------------------------- </span>
<span class="kw">save</s