Non-concave, non-convex functions

Post date: Sep 25, 2010 3:01:08 AM

proc iml;

x=j(1000,1,0);

y=j(1000,1,0);

z=j(1000,1,0);

k=j(1000,1,0);

do i=1 to 1000;

x[i]=-0.004*i;

y[i]=-1*x[i]*(1-exp(x[i]));

z[i]=-1*x[i];

k[i]=-1*x[i]*exp(x[i]);

end;

create set1 var {x,y,z,k};

append;

proc gplot data=set1;

plot y*x z*x/overlay;

plot k*x z*x/overlay;

run;