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- <a name="Additional-minpack-notes-1"></a>
- <h3 class="subsection">D.13.3 Additional <code>minpack</code> notes</h3>
- <p>The <code>lm</code>* functions are better suited to problems in which the
- system function <var>f</var> has more outputs than inputs, and the
- <code>hybr</code>* functions are better suited to the alternative. If either
- is called when the other is more appropriate, the job is handed off to
- the other automatically.
- </p>
- <p>The <code>lmstr</code> function is more memory efficient than the others
- because it doesn’t compute the whole Jacobian matrix at once. Any
- <a name="index-Jacobian-3"></a>
- of the <code>lm</code>* functions is more memory efficient than
- the <code>kinsol</code> equivalent when the output list is sufficiently
- longer than the input list.
- </p>
- <p>Unlike <code>kinsol</code>, there is no provision in <code>minpack</code> for
- <a name="index-constrained-optimization"></a>
- constrained optimization.
- </p>
- <p>The <code>minpack</code> documentation doesn’t state whether it’s
- <a name="index-re_002dentrancy"></a>
- re-entrant, but the odds are against it unless it uses no storage
- outside the user provided work areas. If it isn’t re-entrant,
- anomalous effects could occur when a virtual code function being
- optimized calls another <code>minpack</code> function. A workaround would
- be to use an equivalent <code>kinsol</code> function, which is re-entrant by
- design.
- </p>
- <p>The <code>avram</code> configuration script searches for a C header file
- <a name="index-header-file-1"></a>
- ‘<tt>minpack.h</tt>’ on the host system in order to build an interface to
- this library. This file is specific to the Debian <code>minpack-dev</code>
- package and is not part of the upstream Fortran source. Configuring
- <code>avram</code> with an interface to the <code>minpack</code> library on a
- <a name="index-Debian-1"></a>
- non-Debian system may require the administrator to retrieve the header
- file manually from the Debian archive and place it under
- ‘<tt>/usr/include</tt>’ before running the configuration script (in
- addition to installing the <code>minpack</code> library itself, of course).
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