<span class="op">(</span>color<span class="op">=</span><span class="st">"blue"</span><span class="op">)</span> <span class="op">+</span> <span class="fu">theme_minimal</span><span class="op">(</span><span class="op">)</span> <span class="op">+</span> <span class="fu">theme</span><span class="op">(</span>axis.title <span class="op">=</span> <span class="fu">element_blank</span><span class="op">(</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span> <span class="fu">ggtitle</span>