[yt-users] ray objects

[Elizabeth Tasker]

Hi,

When you create a ray object with yt, e.g.

ray1 = pf.h.ray([10,16,16], [10.3,16.1,16])

I was expecting to get the values of the cells that lie inbetween those 
two sets of co-ordinates. Instead, it looks like the first two values 
back at the start and end points. .e.g.:

-------> print(ray1["x"])
Warning: divide by zero encountered in divide
Warning: invalid value encountered in multiply
Warning: divide by zero encountered in divide
Warning: invalid value encountered in multiply
yt : [INFO     ] 2011-08-16 14:47:27,962 Getting field t from 92
yt : [INFO     ] 2011-08-16 14:47:28,972 Getting field x from 92
[ 10.0078125   10.30078125  10.0234375   10.0390625   10.0390625
  10.0546875   10.0703125   10.0859375   10.0859375   10.1015625
  10.1171875   10.1328125   10.1328125   10.1484375   10.1640625
  10.17578125  10.18359375  10.18359375  10.19140625  10.19921875
  10.20703125  10.20703125  10.21484375  10.22265625  10.23046875
  10.23046875  10.23828125  10.24609375  10.25390625  10.25390625
  10.26171875  10.26953125  10.27734375  10.27734375  10.28515625
  10.29296875]

In [53]: print ray1["y"]
-------> print(ray1["y"])
yt : [INFO     ] 2011-08-16 14:48:23,698 Getting field y from 92
[ 16.0078125   16.09765625  16.0078125   16.0078125   16.0234375
  16.0234375   16.0234375   16.0234375   16.0390625   16.0390625
  16.0390625   16.0390625   16.0546875   16.0546875   16.0546875
  16.05859375  16.05859375  16.06640625  16.06640625  16.06640625
  16.06640625  16.07421875  16.07421875  16.07421875  16.07421875
  16.08203125  16.08203125  16.08203125  16.08203125  16.08984375
  16.08984375  16.08984375  16.08984375  16.09765625  16.09765625
  16.09765625]


Is that right? Should I ignore the first two values of ray1 when I'm 
examining the data, e.g. ray1["Density"]?

Thanks!

Elizabeth