title: Plot all points that statisfy a predicate scilab
body: <p>I have function <strong>P</strong> which takes two points and returns true if they satisfy some condition, false otherwise. I want to plot all the points in range <code>lx &lt;= x &lt;= hx, ly &lt;= y &lt;= hy</code> that satisfy the condition. How to do this in scilab?</p>