ribe
the stations and water quality variables in more detail; they were created
from information at the same web site. Note that the station numbers in
<code>sfbayStns</code> have been prefixed with <code>s</code> to make station codes into
legal variable names. <code>sfbayChla</code> was constructed from the entire
downloaded sfbay dataset and encompasses the period 1969--2009.</p>
    </div>

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><spa