How to draw ellipsoid with plotly

Question

Are there any way to plot a surface like ellipsoid with plotly 3D?

Currently only surfaces of the form z=f(x,y) are discussed in the docs. There is also Mes

Answer 1

Why not solve for z in this equation grabbed from the Mathematic item on ellipsoids:

require(plotly)
a=5; b=7; c=9
x=rep(seq(-10,10,by=1), each=21)
y=rep( seq(-10,10,by=1), times=21)
z <- c^2*sqrt(1-x^2/a^2-y^2/b^2)
#Warning message:
#In sqrt(1 - x^2/a^2 - y^2/b^2) : NaNs produced

 plot_ly(z = matrix(z,21,21), type = "surface")