b(51, 102, 255);">ylabel</span>(a, <span style="color: rgb(204, 51, 204);">'a new Y axis label'</span>);              <span style="font-style: italic;">% first axis (rows)</span><br>&gt;&gt; <span style="color: rgb(51, 102, 255);">zlabel</span>(a, <span style="color: rgb(204, 51, 204);">'a new Z axis label'</span>);              <span style="font-style: italic;">% third axis</span><br>&gt;&gt; <span style="color: rgb(51, 102, 255);">clabel</span>(a, <span style="color: rgb(204, 51, 204);">'a new C axis labe