rr.io/r/base/as.Date.html'>as.Date</a></span><span class='op'>(</span><span class='st'>"2020-04-01"</span><span class='op'>)</span>,
                                              quote <span class='op'>=</span> <span class='st'>"Close"</span>,
                                              retclass <span class='op'>=</span> <span class='st'>"zoo"</span><span class='op'>)</span> <span class='op'>%&gt;%</span>
    <span class='fu'><a href='get_rates_from_prices.html'>get_rates_from_prices</a></span><span class