pnorm is used to create a conic model of rational p-norm.
y = pnorm(x,q/r);
Plot a TV-screen!
x = sdpvar(2,1); plot(pnorm(x,7/2) <= 1);
The operator is implemented using a graph representation based on second-order cone models, and can thus only be used in scenarios where YALMIP can propagate convexity in a conic form.