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Data.table

1,991 bytes added, 14:02, 2 December 2018
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&nbsp; &nbsp; 4: g10000.t1.cds@g10000@000064F &nbsp; &nbsp; &nbsp; 1074 &nbsp;0.278465<br />
&nbsp; &nbsp; 5: g10001.t1.cds@g10001@000064F &nbsp; &nbsp; &nbsp; &nbsp;522 &nbsp;0.962268&nbsp; &nbsp;&nbsp;</span></span></div>
 
<h1><span style="font-family:courier new,courier,monospace">Fast melt for Data table</span></h1>
 
<h3 style="color:#aaa;font-style:italic;"><span style="font-family:courier new,courier,monospace">Input (head)</span></h3>
 
<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;"><span style="font-size:11px"><span style="font-family:courier new,courier,monospace">&nbsp; &nbsp; &nbsp; &nbsp; Position G4-SV40 G4-SV40-OHT<br />
&nbsp; &nbsp; 1: 101488764 &nbsp; &nbsp; &nbsp;52 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;51<br />
&nbsp; &nbsp; 2: 101488765 &nbsp; &nbsp; &nbsp;52 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;50<br />
&nbsp; &nbsp; 3: 101488766 &nbsp; &nbsp; &nbsp;52 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;49<br />
&nbsp; &nbsp; 4: 101488767 &nbsp; &nbsp; &nbsp;53 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;49<br />
&nbsp; &nbsp; 5: 101488768 &nbsp; &nbsp; &nbsp;54 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;49</span></span></div>
 
<h3 style="color:#aaa;font-style:italic;"><span style="font-family:courier new,courier,monospace">Code</span></h3>
 
<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;"><big><span style="font-family:courier new,courier,monospace">melt(SeqDepth_dt, id.vars = &quot;Position&quot;)</span></big></div>
 
<h3 style="color:#aaa;font-style:italic;"><span style="font-family:courier new,courier,monospace">Output (head)</span></h3>
 
<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;"><span style="font-size:11px"><span style="font-family:courier new,courier,monospace">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Position &nbsp; &nbsp;variable value<br />
&nbsp; &nbsp; &nbsp;1: 101488764 &nbsp; &nbsp; G4-SV40 &nbsp; &nbsp;52<br />
&nbsp; &nbsp; &nbsp;2: 101488765 &nbsp; &nbsp; G4-SV40 &nbsp; &nbsp;52<br />
&nbsp; &nbsp; &nbsp;3: 101488766 &nbsp; &nbsp; G4-SV40 &nbsp; &nbsp;52<br />
&nbsp; &nbsp; &nbsp;4: 101488767 &nbsp; &nbsp; G4-SV40 &nbsp; &nbsp;53<br />
&nbsp; &nbsp; &nbsp;5: 101488768 &nbsp; &nbsp; G4-SV40 &nbsp; &nbsp;54</span></span></div>
<h1><span style="font-family:courier new,courier,monospace">Data table aggregation with &#39;by&#39;</span></h1>
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