[Met_help] Additional Info

[John Halley Gotway]

Bob,

The information is in the MODE output file, but the MODE-Analysis tool does not currently have the functionality to extract it.  MODE-Analysis will currently only give you the distance between the
centroids, not the X and Y-offsets of those centroids.  We designed MODE-Analysis to be a pretty simple, file filtering tool.  It reads and processes one MODE output line at a time.  The type of
analysis we're talking about would require a different type of design.  It would need to read back and forth between the single cluster lines and the pair cluster lines.

I have used an Rscript in the past to extract this type of information.  Do you guys by any chance have R (http://www.r-project.org) available on your system?

John

Craig, Robert J Civ USAF AFWA 16 WS/WXN wrote:
> Thanks John.  What I was hoping to do was generate a scatter plot of position differences with cloud objects.  If mode match a fcst and cloud object, what was the difference in their centroid position.  Are you saying that won't be possible to determine?
> 
> Bob
> 
> -----Original Message-----
> From: John Halley Gotway [mailto:johnhg at rap.ucar.edu] 
> Sent: Monday, May 17, 2010 4:53 PM
> To: Craig, Robert J Civ USAF AFWA 16 WS/WXN
> Cc: met_help at ucar.edu
> Subject: Re: [Met_help] Additional Info
> 
> 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
>> _______________________________________________
>> Met_help mailing list
>> Met_help at mailman.ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/met_help
>>
>