utdata function, is a dictionary of metadata and data. A description of the keys and values of this dictionary can be obtained from the Python <i>help</i> messages for these functions, for example, <i>help(pyferret.putdata)</i>, but is also described here.</p>
<h3>The data key</h3>
<p>The actual data values are given in an array associated with the <i>"data"</i> key in these dictionaries.</p>
<dl><dt>"data"</dt>
<dd>a NumPy array or masked array. Currently, only numeric arrays are supported, and the data wi