input'>
<span class='fu'><a href='https://rdrr.io/r/utils/data.html'>data</a></span><span class='op'>(</span><span class='va'>M</span><span class='op'>)</span>
<span class='fu'><a href='https://rdrr.io/r/utils/head.html'>head</a></span><span class='op'>(</span><span class='va'>M</span><span class='op'>)</span>
</div><div class='output co'>#&gt; The matrix :
#&gt; 
#&gt;        log(S/US) : P1T1 log(S/US) : P1T2 log(S/US) : P1T3
#&gt; gene 1         41.37771         42.22949       -31.925168
#&gt; gene 2     