Proc Data problem

[CerditoSalvaje]

Hello everybody, I have a silly question, but I've been working on it since 3 days. 

In the sashelp.lake database we have the same X repeated the length of Y times. And I have to do something like that to represent a function with proc g3d (in order to have z = y*x). 

If you could please tell me how sashelp.lake is created is gonna be very helpful.

Thanks

[Tom · Accepted solution]

No idea how LAKE dataset was generated but perhaps something like:

data test1;
  do width=0 to 10 by 0.5 ;
    do length=0 to 7 by 0.5 ;
      z= width*length ;
      output;
    end;
  end;
run;

[CerditoSalvaje]

my problem is that I want to display a funcion in SAS with proc G3D and I need the data in the same order than lake. But, I have to take X and Y from an uniform law. I'm able to generate Y with IML but not X. 

proc iml;
xmax=2;
xmin=-2;
range=xmax-xmin;
Y=j(range,1,0);
X=j(range,1,0);
X1=j(range*range,1,0);
do i=1 to range;
	call randgen(u,'uniform');
	Y[i,1]=xmin+u*range;
end;

do i=1 to range/2;
	y=y//y;
end;

do i=1 to range;
	call randgen(u1,'uniform');
	X[i,1]=xmin+u1*range;
end;

do i=1 to range;
	do n=1 to range*range;
		X1[n,1]=X[i,1];
	end;
end;
print X1;
run;
quit;

 The idea is to have the axis X1 (which represents the variable x of the function) like the X from sashelp.lake : with a repeated value for each repetition. 

[ballardw]

Since the SASHELP.Lake has exactly 3 variables, Width, Length and Depth I am not sure at all what you mean by " X repeated the length of Y times".

If you want to make graph using Proc G3D the data available should work. The X and Y variables could be either of Width and Length and the Z variable would be Depth.

Proc g3d data=sashelp.lake;
   plot width*length=depth;
run;
quit;