Merge pull request #2984 from chifatty/argmax_argmin

Fix argmax, argmin example MERGEOK

en/reference/ranking-expressions.html

@@ -522,7 +522,7 @@ <h3 id="non-primitive-functions">Non-primitive functions</h3>
   <tr>
     <th>argmax(t, dim)</th>
     <td>
-      <p id="argmax"><code>join(t, max(t, dim), f(x,y)(if (x == y, 1, 0)))</code></p>
+      <p id="argmax"><code>join(t, reduce(t, max, dim), f(x,y)(if (x == y, 1, 0)))</code></p>
       <p>
         Returns a tensor with cell(s) of the highest value(s) in the tensor set to 1.
         The dimension argument follows the same format as reduce as multiple dimensions can be given and is optional.
@@ -532,7 +532,7 @@ <h3 id="non-primitive-functions">Non-primitive functions</h3>
   <tr>
     <th>argmin(t, dim)</th>
     <td>
-      <p id="argmin"><code>join(t, min(t), f(x,y)(if (x &gt;= y, 0, 1)))</code></p>
+      <p id="argmin"><code>join(t, reduce(t, min, dim), f(x,y)(if (x == y, 1, 0)))</code></p>
       <p>
         Returns a tensor with cell(s) of the lowest value(s) in the tensor set to 1.
         The dimension argument follows the same format as reduce as multiple dimensions can be given and is optional.