aboutsummaryrefslogblamecommitdiff
path: root/docs/reference/twa.html
blob: 45670c75b7f6633fd14fdda0856ef8e140c08853 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
               
                                                                                                                                                                                                                                                                                                                                                                                                               
                                                                      
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     






                                                                                                                                                                                                                                                                                                                                                                                                                                                     
 


                                                                                                
 
                                                                                                                         
 
    


                                                                                                                                                                                
 





                                                                                                                                                                                                                     
 


                                                                                              


      
                 
 
    






                                                                                                                                                        

          
                                                


                                                                        
          
 

                                                                                             




                                                                                                                                                                                                                                            
 



                                                                                                 
 
 

                                             
 







                                                                                                      
















                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

                                                                    
 
 

                                             

      

                                                                                                             
      
 
                   
 
  
 
  
 
                
 
<!DOCTYPE html>
<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><meta name="description" content="The moving average is built only using the values in the past, so
the earliest possible time for the maximum in the time series returned
is after one window has passed."><title>Calculate a time weighted average concentration — twa • pfm</title><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.3.1/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.3.1/bootstrap.bundle.min.js"></script><!-- Font Awesome icons --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous"><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous"><!-- bootstrap-toc --><script src="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@v1.0.1/dist/bootstrap-toc.min.js" integrity="sha256-4veVQbu7//Lk5TSmc7YV48MxtMy98e26cf5MrgZYnwo=" crossorigin="anonymous"></script><!-- headroom.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script><!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script><!-- search --><script src="https://cdnjs.cloudflare.com/ajax/libs/fuse.js/6.4.6/fuse.js" integrity="sha512-zv6Ywkjyktsohkbp9bb45V6tEMoWhzFzXis+LrMehmJZZSys19Yxf1dopHx7WzIKxr5tK2dVcYmaCk2uqdjF4A==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/autocomplete.js/0.38.0/autocomplete.jquery.min.js" integrity="sha512-GU9ayf+66Xx2TmpxqJpliWbT5PiGYxpaG8rfnBEk1LL8l1KGkRShhngwdXK1UgqhAzWpZHSiYPc09/NwDQIGyg==" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mark.js/8.11.1/mark.min.js" integrity="sha512-5CYOlHXGh6QpOFA/TeTylKLWfB3ftPsde7AnmhuitiTX4K5SqCLBeKro6sPS8ilsz1Q4NRx3v8Ko2IBiszzdww==" crossorigin="anonymous"></script><!-- pkgdown --><script src="../pkgdown.js"></script><meta property="og:title" content="Calculate a time weighted average concentration — twa"><meta property="og:description" content="The moving average is built only using the values in the past, so
the earliest possible time for the maximum in the time series returned
is after one window has passed."><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]--></head><body>
    <a href="#main" class="visually-hidden-focusable">Skip to contents</a>
    

    <nav class="navbar fixed-top navbar-light navbar-expand-lg bg-light"><div class="container">
    
    <a class="navbar-brand me-2" href="../index.html">pfm</a>

    <small class="nav-text text-muted me-auto" data-bs-toggle="tooltip" data-bs-placement="bottom" title="">0.6.1</small>

    
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div id="navbar" class="collapse navbar-collapse ms-3">
      <ul class="navbar-nav me-auto"><li class="active nav-item">
  <a class="nav-link" href="../reference/index.html">Reference</a>
</li>
      </ul><form class="form-inline my-2 my-lg-0" role="search">
        <input type="search" class="form-control me-sm-2" aria-label="Toggle navigation" name="search-input" data-search-index="../search.json" id="search-input" placeholder="Search for" autocomplete="off"></form>

      <ul class="navbar-nav"><li class="nav-item">
  <a class="external-link nav-link" href="https://github.com/jranke/pfm/" aria-label="github">
    <span class="fab fa fab fa-github fa-lg"></span>
     
  </a>
</li>
      </ul></div>

    
  </div>
</nav><div class="container template-reference-topic">
<div class="row">
  <main id="main" class="col-md-9"><div class="page-header">
      <img src="" class="logo" alt=""><h1>Calculate a time weighted average concentration</h1>
      <small class="dont-index">Source: <a href="https://github.com/jranke/pfm/blob/HEAD/R/twa.R" class="external-link"><code>R/twa.R</code></a></small>
      <div class="d-none name"><code>twa.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>The moving average is built only using the values in the past, so
the earliest possible time for the maximum in the time series returned
is after one window has passed.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">twa</span><span class="op">(</span><span class="va">x</span>, window <span class="op">=</span> <span class="fl">21</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for one_box</span></span>
<span><span class="fu">twa</span><span class="op">(</span><span class="va">x</span>, window <span class="op">=</span> <span class="fl">21</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
    <dl><dt>x</dt>
<dd><p>An object of type <code><a href="one_box.html">one_box</a></code></p></dd>


<dt>window</dt>
<dd><p>The size of the moving window</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="max_twa.html">max_twa</a></code></p></div>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="va">pred</span> <span class="op">&lt;-</span> <span class="fu"><a href="sawtooth.html">sawtooth</a></span><span class="op">(</span><span class="fu"><a href="one_box.html">one_box</a></span><span class="op">(</span><span class="fl">10</span><span class="op">)</span>,</span></span>
<span class="r-in"><span>  applications <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>time <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">0</span>, <span class="fl">7</span><span class="op">)</span>, amount <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">1</span>, <span class="fl">1</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="max_twa.html">max_twa</a></span><span class="op">(</span><span class="va">pred</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $max</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    parent </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 0.9537545 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $window_start</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> parent </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      0 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $window_end</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> parent </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     21 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
</code></pre></div>
    </div>
  </main><aside class="col-md-3"><nav id="toc"><h2>On this page</h2>
    </nav></aside></div>


    <footer><div class="pkgdown-footer-left">
  <p></p><p>Developed by Johannes Ranke.</p>
</div>

<div class="pkgdown-footer-right">
  <p></p><p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.0.7.</p>
</div>

    </footer></div>

  

  

  </body></html>

Contact - Imprint