><dd><p>array (np.array): Numeric data array
val (int or float) : Look-up value
rettype (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.9)"><code class="xref py py-obj docutils literal notranslate"><span class="pre">str</span></code></a>,optional): return type specification</p>
<blockquote>
<div><p>'vectorized' (default) denotes vectorized coordinates (integer)
'coordinates' denotes multidimensional coordinates (tuple)</p>
</div></blockquote>
</