;font-style: italic;'>&lt;dbl&gt;</span><span style='color: #555555;'>, sry </span><span style='color: #555555;font-style: italic;'>&lt;dbl&gt;</span><span></div><div class='input'><span class='fu'>csb_filter</span>(<span class='no'>january_2018</span>, <span class='kw'>var</span> <span class='kw'>=</span> <span class='no'>problemcode</span>, <span class='kw'>category</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span class='n