point surface
 

I wrote a journal file using do loop by scheme prograrm. I want to create point surface. It is working but giving the following error message. The problem is to writing point format. The point I want to get like (1.4, 0), (2.4,0), (3.4,0) and so on along x-axis. I have written the following format and got the error. Could any body help. Thank in advance.


Abir


(format #f "surface/point-surface point-~2.1f () ~a () 0 ()" x x))
)


()Invalid length
0 0 ()()
surface/point-surface point Invalid new surface.
x-0.2 ()Invalid length
0.2 0 ()()
surface/point-surface point Invalid new surface.
x-0.4 ()Invalid length
0.4 0 ()()
------------
----------

x-1.0 ()Invalid length
1 0 ()()
#f