s='no'>y</span>, <span class='no'>x_name</span>, <span class='no'>y_name</span>, <span class='kw'>precision</span> <span class='kw'>=</span> <span class='kw'>NULL</span>)

<span class='co'># S3 method for RasterLayer</span>
<span class='fu'>mapcurves_calc</span>(<span class='no'>x</span>, <span class='no'>y</span>, <span class='kw'>x_name</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>y_name</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>pr