[Met_help] [rt.rap.ucar.edu #86145] History for ref: How to find "absolute values"

[John Halley Gotway via RT]

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  Initial Request
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Good afternoon,

I am trying to find "absolute intensity errors" using AMAX_WIND and
BMAX_WIND.

I am able to find the difference ie; AMAX_WIND-BMAX_WIND.  However, when I
tried to find its absolute value; the program fails.

The following methods have been tried:

DEP_VAL = (abs(AMAX_WIND-BMAX_WIND))
DEP_VAL = (ABS(AMAX_WIND-BMAX_WIND))
DEP_VAL = "(ABS(AMAX_WIND-BMAX_WIND))"
DEP_VAL = "(abs(AMAX_WIND-BMAX_WIND))"
DEP_VAL= (ABS\AMAX_WIND-BMAX_WIND\)
DEP_VAL= (abs\AMAX_WIND-BMAX_WIND\)

How does one use the "absolute" function?

Thanks,
Steve


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  Complete Ticket History
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Subject: ref: How to find "absolute values"
From: Minna Win
Time: Wed Jul 11 13:06:42 2018

Hi Steve,

If running tc_stat from the command line, you would get the absolute
intensity error in the following fashion:

$MET_HOME/bin/tc_stat \
-lookin /path/to/input/files \
-job summary \
-col 'ABS(AMAX_WIND-BMAX_WIND)' \
-dump_row /path/to/output/file.tcst

Likewise, if running plot_tcmpr from the command line:
Rscript $MET_HOME/share/met/Rscripts/plot_tcmpr.R -lookin
/path/to/input/files \
-dep 'ABS(AMAX_WIND-BMAX_WIND)'

where you replace the '/path/to..' to your paths.

MET is looking for the single quotes around the arithmetic expression.

We are currently working on the stand-alone tc_stat wrapper in
METplus,
where you can perform job filtering and job summaries and hope to have
this
available in the next METplus release.

I hope this clarifies things for you.  Please don't hesitate to
contact us
if you require further clarification.

Regards,
Minna


---------------
Minna Win
NCAR
Research Applications Lab
Phone: 303-497-8423
Fax:   302-497-8401



On Wed, Jul 11, 2018 at 6:31 PM Steven Lilly - NOAA Federal via RT <
met_help at ucar.edu> wrote:

>
> Wed Jul 11 12:30:39 2018: Request 86145 was acted upon.
> Transaction: Ticket created by steven.lilly at noaa.gov
>        Queue: met_help
>      Subject: ref: How to find "absolute values"
>        Owner: Nobody
>   Requestors: steven.lilly at noaa.gov
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=86145 >
>
>
> Good afternoon,
>
> I am trying to find "absolute intensity errors" using AMAX_WIND and
> BMAX_WIND.
>
> I am able to find the difference ie; AMAX_WIND-BMAX_WIND.  However,
when I
> tried to find its absolute value; the program fails.
>
> The following methods have been tried:
>
> DEP_VAL = (abs(AMAX_WIND-BMAX_WIND))
> DEP_VAL = (ABS(AMAX_WIND-BMAX_WIND))
> DEP_VAL = "(ABS(AMAX_WIND-BMAX_WIND))"
> DEP_VAL = "(abs(AMAX_WIND-BMAX_WIND))"
> DEP_VAL= (ABS\AMAX_WIND-BMAX_WIND\)
> DEP_VAL= (abs\AMAX_WIND-BMAX_WIND\)
>
> How does one use the "absolute" function?
>
> Thanks,
> Steve
>
>

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