The derivative of this function is d2f().
function df
extends Modelica.Icons.Function;
input Real x "Argument" annotation(
Dialog(__Dymola_label = "<html><i>x</i></html>"));
input Real a[:] "Coefficients" annotation(
Dialog(__Dymola_label = "<html><i>a</i></html>"));
input Integer n = 0 "Power associated with the first term (before derivative)" annotation(
Dialog(__Dymola_label = "<html><i>n</i></html>"));
input Real dx "Derivative of argument" annotation(
Dialog(__Dymola_label = "<html>d<i>x</i></html>"));
input Real da[size(a, 1)] = zeros(size(a, 1)) "Derivatives of coefficients" annotation(
Dialog(__Dymola_label = "<html>d<i>a</i></html>"));
output Real df "Derivative" annotation(
Dialog(__Dymola_label = "<html>d<i>f</i></html>"));
end df;