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  <title>Matrix transpose 2×3</title>
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  <h1>Transpose a 2×3 matrix</h1>
  <p>Edit the array, then <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(o,r,t){var n,u,e=[];for(n=0;n<t;n++)for(e[n]=[],u=0;u<r;u++)e[n][u]=o[u][n];var f=[];for(f.push("Original ("+r+" x "+t+"):"),n=0;n<r;n++){var s="";for(u=0;u<t;u++)s+=o[n][u]+"\t";f.push(s)}for(f.push(""),f.push("Transposed Matrix ("+t+" x "+r+"):"),n=0;n<t;n++){for(s="",u=0;u<r;u++)s+=e[n][u]+"\t";f.push(s)}document.getElementById("out").textContent=f.join("\n")}([[1,2,3],[4,5,6]],2,3)</script>
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JavaScript Matrix Transpose — 2×3 (Try It)