Question: How can I plot3d

I'm straggling with Maple. The main purpose is to plot f(x,y)

I have two for loops for x and y  coordinates and I want to plot f(x,y)

for i from 1 to 5 do
for j from 1 to 5 do
xxiI]:=evalf(xx[0]+II*0.1):
x:=xx[i]:
yy[j]:=evalf(j*0.1):
 y:=yy[j]:
here I should type yhr function that depends on x and y( how can)

od:od:

and then i put the list of  points:=seq,( x,y,f(x,y) ??

and then surfdata(ponts)

is my logic right???

 

 

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