Floating point round-off. Since .2 is not a multiple of 1/16. If the spacing were .25, I would expect a 0.0.<br><br><br><div class="gmail_quote">On Tue, Oct 18, 2011 at 12:52 PM, Panagiotis Foteinos <span dir="ltr"><<a href="mailto:pafotein@gmail.com">pafotein@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hello users.<br>
<br>
I noticed that whenever the coordinates of a voxel center should be<br>
zero, the value 2.26498e-07 is computed instead. For example, I have<br>
an image of spacing [0.2, 0.2, 0.2], and iterating though it gives the<br>
following result for the physical coordinates of 5 consecutive pixels:<br>
******************************<br>
[-0.4, -15.2, -5.2]<br>
[-0.2, -15.2, -5.2]<br>
[2.26498e-07, -15.2, -5.2]<br>
[0.2, -15.2, -5.2]<br>
[0.4, -15.2, -5.2]<br>
******************************<br>
<br>
The increment happens along the x-axis, and you can see the patern:<br>
-0.4 -> -0.2 -> 2.26498e-07 -> 0.2 -> 0.4. Why 2.26498e-07 and not 0<br>
as it is supposed to be?<br>
<br>
<br>
Any comments?<br>
<br>
<br>
Best Regards,<br>
Panagiotis Foteinos<br>
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</blockquote></div><br>