Prefigure Request contour plots

[Thomas Judson]

It would be nice if we could do contour plots in PreFigure such as the following.

<prefigure xmlns="https://prefigure.org" label="hamiltonian-levelsets-x3y3”>

 <diagramdimensions="(300,300)" margins="35”> 

<coordinates bbox="[-2.5, -2.5, 2.5, 2.5]”> 

<grid-axes xlabel="x" ylabel="y”/>

<contour-plot function="(x,y) |-&gt; x^3 + y^3" contours="[-4,-2,-1,-0.5,0,0.5,1,2,4]" thickness="1.5"/> 

</coordinates>

</diagram> 

</prefigure>

 Of course, it’s not too hard to get around this but…

Tom