CS.obj

Used in <code>solnp()</code> as the objective function to be minimized when
chi-square distance measure is chosen. Unlike <code>AIT.obj()</code> and <code>KL.obj()</code>,
does not require modifying zeros.

Accurate estimates of the diets of predators are required
in many areas of ecology, but for many species current methods are
imprecise, limited to the last meal, and often biased. The diversity
of fatty acids and their patterns in organisms, coupled with the
narrow limitations on their biosynthesis, properties of digestion in
monogastric animals, and the prevalence of large storage reservoirs of
lipid in many predators, led to the development of quantitative
fatty acid signature analysis (QFASA) to study predator diets.

Connie Stewart

QFASA

Quantitative Fatty Acid Signature Analysis

Sara Iverson

Chris Field

Don Bowen

Wade Blanchard

Shelley Lang

Justin Kamerman

Hongchang Bao

Holly Steeves

Jennifer McNichol

Tyler Rideout

CS.obj function

<dl><dt>alpha</dt>
<dd>vector over which minimization takes place.</dd>
<dt>predator</dt>
<dd>fatty acid signature of predator.</dd>
<dt>prey.quantiles</dt>
<dd>matrix of fatty acid signatures of
prey. Each row contains an individual prey signature from a different
species.</dd>
<dt>gamma</dt>
<dd>power transform exponent (see <code>chisq.dist()</code>).</dd></dl>

Arguments

Used in solnp() as the objective function to be minimized when
chi-square distance measure is chosen. Unlike AIT.obj() and KL.obj(),
does not require modifying zeros. — CS.obj

<dl>

<dt>alpha</dt>
<dd>vector over which minimization takes place.</dd>


<dt>predator</dt>
<dd>fatty acid signature of predator.</dd>


<dt>prey.quantiles</dt>
<dd>matrix of fatty acid signatures of
prey. Each row contains an individual prey signature from a different
species.</dd>


<dt>gamma</dt>
<dd>power transform exponent (see <code>chisq.dist()</code>).</dd>

</dl>

Used in <code>solnp()</code> as the objective function to be minimized when
chi-square distance measure is chosen. Unlike <code>AIT.obj()</code> and <code>KL.obj()</code>,
does not require modifying zeros.

CS.obj: Used in `solnp()` as the objective function to be minimized when chi-square distance measure is chosen. Unlike `AIT.obj()` and `KL.obj()`, does not require modifying zeros.

Description

Usage

Arguments