r - How to cut off persp3d outside of the plot area -


i plotting bivariate function x*y using persp3d.

if not use zlim shape of graph distorted rescaling:

persp3d(x,y,z, theta = 10, phi = 15, forceclipregion = true, shade = 0.3)

without zlim

if use zlim function plots outside of plot area, , of coloring invisible:

persp3d(x,y,z, theta = 10, phi = 15, zlim=c(0,4), forceclipregion = true, shade = 0.3)

enter image description here

is there way make r crop plot @ top of box?


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