surf.ls(np, x, y, z)
np
| degree of polynomial surface |
x
|
x coordinates or a data frame with columns x , y , z
|
y
| y coordinates |
z
|
z coordinates. Will supersede x$z
|
beta
| the coefficients |
x
| |
y
| |
z
| and others for internal use only. |
trmat
topo.kr <- surf.ls(2, topo) trsurf <- trmat(topo.kr, 0, 6.5, 0, 6.5, 50) contour(trsurf) points(topo)