pan><span class="kw">c</span>(<span class="st">"CHB"</span>,<span class="st">"JPT"</span>,<span class="st">"CHS"</span>,<span class="st">"CDX"</span>,<span class="st">"KHV"</span>),<span class="op">-</span><span class="kw">c</span>(<span class="dv">2</span>,<span class="dv">4</span>)]

<span class="co">#all column value from EUR/EAS and first FORMAT column</span>
eur_gt &lt;-<span class="st"> </span>snp<span class="op">@</span>gt[,<span class="kw">colnames</span>(snp<span class="op">@</span>gt) <span class=