se.org/reference/ggplot.html" class="external-link">ggplot</a></span><span class="op">(</span><span class="fu"><a href="https://ggplot2.tidyverse.org/reference/aes.html" class="external-link">aes</a></span><span class="op">(</span>x_major <span class="op">=</span> <span class="va">long</span>, y_major <span class="op">=</span> <span class="va">lat</span>,</span>
<span>              x_minor <span class="op">=</span> <span class="va">month</span>, ymin_minor <span class="op">=</span> <span class="va">tmin</sp