arm(L,M,theta,phi,'r')
</pre>

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<div class="subtitle">Description</div>

<p>
<code>spherharm</code> returns the value of the normalized spherical harmonic
<img src="eqn/spherharm1.png" alt="[eqn]"><!--MATH
\begin{equation*}
Y_{L,M}(\theta,\phi)
\end{equation*}
-->
with non-negative integer L and |M| &le; L. The Condon-Shortley phase (-1)<sup>M</sup> is included.
</p>

<p>
<code>theta</code> is the angle down from the z axis (colatitude), 