ble&nbsp;to,
 double&nbsp;delta)</code></div>
<div class="col-last even-row-color">
<div class="block">Returns array of double values of the function f(i)
 calculated on the range: i = from to i = to by step = delta</div>
</div>
<div class="col-first odd-row-color"><code>static double</code></div>
<div class="col-second odd-row-color"><span class="type-name-label">Calculus.</span><code><a href="../mathcollection/Calculus.html#integralTrapezoid(org.mariuszgromada.math.mxparser.Expression,org.mariuszgromada.m