actually it seems to work a lot worse for me than the examples shown.
the option [psfile, "c:/temp/sin.eps"]
causes a file maxout.gnuplot to appear in c:/temp.
I then fire up a cygwin command shell and run gnuplot in it to produce
sin.eps
I am using windows xp, wxmaxima, maxima 5.25.1
unfortunately, an eps file does not work with pdflatex, which I am using,
even with
\documentclass{article}
\usepackage{fullpage}
\usepackage{graphicx}
\usepackage{epstopdf}
....
\begin{figure*}
\centerline{
\mbox{\includegraphics[width=3.00in]{c:/temp/sin.eps}}
}
\caption{sin}
\label{sinplot}
\end{figure*}