Plot 3d implicit function and inequality

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Fernando
Fernando 2015 年 10 月 8 日
Hi,
I need to plot a 3d equation and inequality, with some constraints. The equation and inequality are the following
(u.^2).*(p.^2).*(1-exp(-r.*z))-2.*u.*p.*t.*(1+exp(-r.*z))+(t.^2).*(1-exp(-r.*z))+4.*exp(-r.*z)=0
and
(u.^2).*(p.^2).*(1-exp(-r.*z))-2.*u.*p.*t.*(1+exp(-r.*z))+(t.^2).*(1-exp(-r.*z))+4.*exp(-r.*z)<=0
r and t are scalars, say r=0.001 and t=1. u and z can take non-negative values, 0<=u<=1, and 0<=t, while p takes values that either satisfy the equation or inequality. In the case of the equality, I would like to have a 3d plot with u and z in the "lower" axis and p in the "vertical" axis. The same for the inequality though in this case I would need to represent the whole area that satisfies the inequality.
Thanks

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