minimization of powell's function
 
nvert= 5		nparm= 4

ndata= 0		ndatval= 0

iter= 0			maxquad_skip= 4		exit_test= -1.e-12

prt_cycle= 30		quad_test= 00
 
simplex[nvert][nparm=a,b]= 
3 -1  0  1
0 -1  0  1
3  0  0  1
3 -1  1  1
3 -1  0  0

 
data[ndata][y,yc,w,x]= 

verbose= 3