[Met_help] Additional Info

[John Halley Gotway]

Bob,

I ran the following job on the file you sent and got the following output:

mode_analysis -lookin
mode_TCDC_EATM_vs_CSDLF_EATM_000000L_20100312_000000V_000000A_obj.txt
-cluster -pair -summary -column CENTROID_DIST

Total mode lines read =  42
Total mode lines kept =   6

        Field   N    Min    Max   Mean   StdDev    P10    P25    P50   
P75    P90     Sum
-------------   -   ----   ----   ----   ------   ----   ----   ----  
----   ----   -----
centroid_dist   6   0.43   8.74   4.82     3.30   1.05   1.93   5.04  
7.82   8.36   28.89

It found 6 matched pairs of clusters and dumped out info about their
centroid distances.  Your confusion is coming from using "CENTROID_X" and
"CENTROID_Y".  The X,Y location of a centroid is an attribute of a
"SINGLE" object.  Those CENTROID_X/_Y columns contain NA's in the "PAIR"
lines, and in this job we're looking at those pair lines.  That's why
you're seeing 0's in the output.

Try running the following two jobs:

mode_analysis -lookin
mode_TCDC_EATM_vs_CSDLF_EATM_000000L_20100312_000000V_000000A_obj.txt
-cluster -single -fcst -summary -column CENTROID_X -column CENTROID_Y

mode_analysis -lookin
mode_TCDC_EATM_vs_CSDLF_EATM_000000L_20100312_000000V_000000A_obj.txt
-cluster -single -obs -summary -column CENTROID_X -column CENTROID_Y

That'll give you information about the single/fcst/cluster and
single/obs/cluster X/Y centroids.  But there is not currently any way in
the MODE analysis tool to extract X and Y offsets directly.

Certain MODE attributes are applicable to SINGLE objects and other are
applicable to PAIRS of objects.  For example, CENTROID_X/_Y only apply to
SINGLE objects and CENTROID_DIST only applies to PAIRS of objects.

Hope this helps clarify.

John





> John, I did try removing the -fcst flag after I sent you the command list,
> but that still returned a zero size file.
>
> Thanks
>
> Bob
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