ndicating the spatial covariance parameters
with specified initial and/or known values. <code>is_known</code> is a named
numeric vector indicating whether the spatial covariance parameters in
<code>initial</code> are known or not. The class of the list
matches the the relevant spatial covariance type.</p>
    </div>
    <div id="details">
    <h2>Details</h2>
    <p>Create an initial object for use with <code><a href="ssn_lm.html">ssn_lm()</a></code> or <code><a href="ssn_glm.html">ssn_glm()</a></code>.
<co