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the form of a semicircle, with radial lines and spokes connecting
at a focus point on the flat (lower) edge.  The radius of a point
on the graph indicates the standard deviation of the corresponding
quantity, i.e. x and the columns in y.  The angle connecting a
point on the graph to the focus provides an indication of
correlation coefficient with respect to x."><meta property="og:description" content="Creates a diagram as described by Taylor (2001).  The graph is in
the form of a semicircle, with radial lines and spokes connecting
at a focus point on the flat (lower) edge.  The radius of a point
on the graph indicates the standard deviation of the corresponding
quantity, i.e. x and the columns in y.  The angle connecting a
point on the graph to the focus provides an indication of
correlation coefficient with respect to x."></head><body>
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      <h1>Plot a Model-data Comparison Diagram</h1>
      <small class="dont-index">Source: <a href="https://github.com/dankelley/oce/blob/HEAD/R/misc.R" class="external-link"><code>R/misc.R</code></a></small>
      <div class="d-none name"><code>plotTaylor.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>Creates a diagram as described by Taylor (2001).  The graph is in
the form of a semicircle, with radial lines and spokes connecting
at a focus point on the flat (lower) edge.  The radius of a point
on the graph indicates the standard deviation of the corresponding
quantity, i.e. x and the columns in y.  The angle connecting a
point on the graph to the focus provides an indication of
correlation coefficient with respect to x.</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">plotTaylor</span><span class="op">(</span><span class="va">x</span>, <span class="va">y</span>, <span class="va">scale</span>, pch <span class="op">=</span> <span class="fl">1</span>, col <span class="op">=</span> <span class="fl">1</span>, <span class="va">labels</span>, pos <span class="op">=</span> <span class="fl">2</span>, cex <span class="op">=</span> <span class="fl">1</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 id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
<dd><p>a vector of reference values of some quantity, e.g.
measured over time or space.</p></dd>


<dt id="arg-y">y<a class="anchor" aria-label="anchor" href="#arg-y"></a></dt>
<dd><p>a matrix whose columns hold values of values to be
compared with those in x.  (If <code>y</code> is a vector, it is converted
first to a one-column matrix).</p></dd>


<dt id="arg-scale">scale<a class="anchor" aria-label="anchor" href="#arg-scale"></a></dt>
<dd><p>optional scale, interpreted as the maximum value of
the standard deviation.</p></dd>


<dt id="arg-pch">pch<a class="anchor" aria-label="anchor" href="#arg-pch"></a></dt>
<dd><p>vector of plot symbols, used for points on the plot. If
this is of length less than the number of columns in <code>y</code>, then it
it is repeated as needed to match those columns.</p></dd>


<dt id="arg-col">col<a class="anchor" aria-label="anchor" href="#arg-col"></a></dt>
<dd><p>vector of colors for points on the plot, repeated as
necessary (see <code>pch</code>).</p></dd>


<dt id="arg-labels">labels<a class="anchor" aria-label="anchor" href="#arg-labels"></a></dt>
<dd><p>optional vector of strings to use for labelling the
points.</p></dd>


<dt id="arg-pos">pos<a class="anchor" aria-label="anchor" href="#arg-pos"></a></dt>
<dd><p>optional vector of positions for labelling strings,
repeated as necessary (see <code>pch</code>).</p></dd>


<dt id="arg-cex">cex<a class="anchor" aria-label="anchor" href="#arg-cex"></a></dt>
<dd><p>character expansion factor, repeated if necessary
(see <code>pch</code>).</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>The “east” side of the graph indicates \(R=1\), while
\(R=0\) is at the "north" edge and \(R=-1\) is at
the "west" side.  The <code>x</code> data are indicated with a bullet on the
graph, appearing on the lower edge to the right of the focus at a
distance indicating the standard deviation of `x`.  The other
points on the graph represent the columns of `y`, coded
automatically or with the supplied values of `pch` and `col`. The
example shows three tidal models of the Halifax sealevel data,
computed with <code><a href="tidem.html">tidem()</a></code> with only the M2 component, only the S2
component, or all (auto-selected) components.</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>Taylor, Karl E. "Summarizing Multiple Aspects of Model
Performance in a Single Diagram." <em>Journal of Geophysical Research:
Atmospheres</em> 106, no. D7 (April 16, 2001): 7183–92.
https://doi.org/10.1029/2000JD900719.</p>
    </div>
    <div class="section level2">
    <h2 id="author">Author<a class="anchor" aria-label="anchor" href="#author"></a></h2>
    <p>Dan Kelley</p>
    </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="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="https://dankelley.github.io/oce/">oce</a></span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/data.html" class="external-link">data</a></span><span class="op">(</span><span class="va">sealevel</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">x</span> <span class="op">&lt;-</span> <span class="va">sealevel</span><span class="op">[[</span><span class="st">"elevation"</span><span class="op">]</span><span class="op">]</span></span></span>
<span class="r-in"><span><span class="va">M2</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/predict.html" class="external-link">predict</a></span><span class="op">(</span><span class="fu"><a href="tidem.html">tidem</a></span><span class="op">(</span><span class="va">sealevel</span>, constituents <span class="op">=</span> <span class="st">"M2"</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">S2</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/predict.html" class="external-link">predict</a></span><span class="op">(</span><span class="fu"><a href="tidem.html">tidem</a></span><span class="op">(</span><span class="va">sealevel</span>, constituents <span class="op">=</span> <span class="st">"S2"</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">all</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/predict.html" class="external-link">predict</a></span><span class="op">(</span><span class="fu"><a href="tidem.html">tidem</a></span><span class="op">(</span><span class="va">sealevel</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> Note: the tidal record is too short to fit for constituents: SA, PI1, S1, PSI1, GAM2, H1, H2, T2, R2</span>
<span class="r-in"><span><span class="fu">plotTaylor</span><span class="op">(</span><span class="va">x</span>, <span class="fu"><a href="https://rdrr.io/r/base/cbind.html" class="external-link">cbind</a></span><span class="op">(</span><span class="va">M2</span>, <span class="va">S2</span>, <span class="va">all</span><span class="op">)</span>, labels <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="st">"M2"</span>, <span class="st">"S2"</span>, <span class="st">"all"</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-plt img"><img src="plotTaylor-1.png" alt="" width="700" height="700"></span>
<span class="r-in"><span></span></span>
</code></pre></div>
    </div>
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