>
> On Nov 5, 2011, at 7:20 PM, ScottDaniel wrote:
>
> > So I have a text file that looks like this:
> > "Label"	"X"	"Y"	"Slice"
> > 1	"Field_1_R3D_D3D_PRJ_w617.tif"	348	506	1
> > 2	"Field_1_R3D_D3D_PRJ_w617.tif"	359	505	1
> > 3	"Field_1_R3D_D3D_PRJ_w617.tif"	356	524	1
> > 4	"Field_1_R3D_D3D_PRJ_w617.tif"	2	0	1
> > 5	"Field_1_R3D_D3D_PRJ_w617.tif"	412	872	1
> > 6	"Field_1_R3D_D3D_PRJ_w617.tif"	422	863	1
> > 7	"Field_1_R3D_D3D_PRJ_w617.tif"	429	858	1
> > 8	"Field_1_R3D_D3D_PRJ_w617.tif"	429	880	1
> > 9	"Field_1_R3D_D3D_PRJ_w617.tif"	437	865	1
> > 10	"Field_1_R3D_D3D_PRJ_w617.tif"	447	855	1
> > 11	"Field_1_R3D_D3D_PRJ_w617.tif"	450	868	1
> > 12	"Field_1_R3D_D3D_PRJ_w617.tif"	447	875	1
> > 13	"Field_1_R3D_D3D_PRJ_w617.tif"	439	885	1
> > 14	"Field_1_R3D_D3D_PRJ_w617.tif"	2	8	1
> >
> > What it represents are the locations of centromeres per nucleus in a
> > microscope image. What I need to do is do a dist() on each grouping
> > (the
> > grouping being separated by the low values of x and y's) and then
> > compute an
> > average. The part that I'm having trouble with is writing code that
> > will
> > allow R to separate these objects.
>
> I'm having trouble figuring out what you mean by "separating the
> objects". Each row is a separate reading, and I think you just want
> pairwise distances, right?

What I mean is that rows 1-3 represent one group of centromeres and
rows 5-13 represent a second group. So I want to do a separate dist on
each group (i.e. I want a pair wise distance for rows 1 and 3 but not
1 and 12). Does that clear thing up?


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