[Met_help] [rt.rap.ucar.edu #90403] History for point_stat interpolation
John Halley Gotway via RT
met_help at ucar.edu
Mon Jun 3 12:10:30 MDT 2019
----------------------------------------------------------------
Initial Request
----------------------------------------------------------------
Hi:
I'm running point_stat using a bi linear interpolation method. However,
the output messages are confusing me somewhat. According to the met
documentation, bi linear interpolation, the width should equal 2 (4 data
points). However, my output looks like this:
DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for observation type
MSG001, over region FULL, for interpolation method BILIN(4), using 9 pairs.
What does the "9 pairs" mean here?
Tina
--
*************************************************
Christina Kalb
Associate Scientist
National Center for Atmospheric Research
3450 Mitchell Lane
Boulder, CO 80301
kalb at ucar.edu
303-497-2819
*************************************************
----------------------------------------------------------------
Complete Ticket History
----------------------------------------------------------------
Subject: point_stat interpolation
From: Minna Win
Time: Thu May 30 15:35:17 2019
Hi Tina,
John will most likely be able to answer your question, but he is out
of the
office until June 3. I hope you don't mind waiting a few more days to
have
your question answered.
Thanks,
Minna
---------------
Minna Win
NCAR
Research Applications Lab
Phone: 303-497-8423
Fax: 303-497-8401
On Thu, May 30, 2019 at 9:22 PM Christina Kalb via RT
<met_help at ucar.edu>
wrote:
>
> Thu May 30 15:22:07 2019: Request 90403 was acted upon.
> Transaction: Ticket created by kalb
> Queue: met_help
> Subject: point_stat interpolation
> Owner: Nobody
> Requestors: kalb at ucar.edu
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
>
>
> Hi:
>
> I'm running point_stat using a bi linear interpolation method.
However,
> the output messages are confusing me somewhat. According to the met
> documentation, bi linear interpolation, the width should equal 2 (4
data
> points). However, my output looks like this:
>
> DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation type
> MSG001, over region FULL, for interpolation method BILIN(4), using 9
pairs.
>
> What does the "9 pairs" mean here?
>
> Tina
>
> --
> *************************************************
> Christina Kalb
> Associate Scientist
> National Center for Atmospheric Research
> 3450 Mitchell Lane
> Boulder, CO 80301
> kalb at ucar.edu
> 303-497-2819
> *************************************************
>
>
------------------------------------------------
Subject: point_stat interpolation
From: John Halley Gotway
Time: Mon Jun 03 11:36:11 2019
Tina,
I see you have a question about the following Point-Stat log message:
DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for observation
type
MSG001, over region FULL, for interpolation method BILIN(4), using 9
pairs.
There is nothing to be concerned about here. For each verification
task
you request in the config file (where a vx task is a combination of
forecast variable/level, verifying point observation message type,
masking
region, and interpolation method), Point-Stat loops through the point
observations and selects the ones which apply. In this case, Point-
Stat
found 9 point observations for this vx task based on your
configuration
settings. So that "9 pairs" means that that's the number of matched
pairs
that will be used in the computation of statistics for this task.
The "BILIN(4)" means that bilinear interpolation is being used.
You're
correct, bilinear interpolation always uses a 2x2 box = 4 grid points.
Thanks,
John
On Thu, May 30, 2019 at 3:44 PM Minna Win via RT <met_help at ucar.edu>
wrote:
>
> Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> Transaction: Given to johnhg (John Halley Gotway) by minnawin
> Queue: met_help
> Subject: point_stat interpolation
> Owner: johnhg
> Requestors: kalb at ucar.edu
> Status: open
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
>
>
> This transaction appears to have no content
>
------------------------------------------------
Subject: point_stat interpolation
From: Christina Kalb
Time: Mon Jun 03 11:40:17 2019
HI John:
I suppose the part I was confused about was the "9 pairs."
Tina
On Mon, Jun 3, 2019 at 11:36 AM John Halley Gotway via RT
<met_help at ucar.edu>
wrote:
> Tina,
>
> I see you have a question about the following Point-Stat log
message:
>
> DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation type
> MSG001, over region FULL, for interpolation method BILIN(4), using 9
pairs.
>
> There is nothing to be concerned about here. For each verification
task
> you request in the config file (where a vx task is a combination of
> forecast variable/level, verifying point observation message type,
masking
> region, and interpolation method), Point-Stat loops through the
point
> observations and selects the ones which apply. In this case, Point-
Stat
> found 9 point observations for this vx task based on your
configuration
> settings. So that "9 pairs" means that that's the number of matched
pairs
> that will be used in the computation of statistics for this task.
>
> The "BILIN(4)" means that bilinear interpolation is being used.
You're
> correct, bilinear interpolation always uses a 2x2 box = 4 grid
points.
>
> Thanks,
> John
>
> On Thu, May 30, 2019 at 3:44 PM Minna Win via RT <met_help at ucar.edu>
> wrote:
>
> >
> > Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> > Transaction: Given to johnhg (John Halley Gotway) by minnawin
> > Queue: met_help
> > Subject: point_stat interpolation
> > Owner: johnhg
> > Requestors: kalb at ucar.edu
> > Status: open
> > Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
> >
> >
> > This transaction appears to have no content
> >
>
>
--
*************************************************
Christina Kalb
Associate Scientist
National Center for Atmospheric Research
3450 Mitchell Lane
Boulder, CO 80301
kalb at ucar.edu
303-497-2819
*************************************************
------------------------------------------------
Subject: point_stat interpolation
From: John Halley Gotway
Time: Mon Jun 03 11:59:16 2019
Tina,
Yep, in Point-Stat, we call a paired forecast and observation value a
"matched pair". The log message just indicates that Point-Stat has
found 9
matched pairs for this verification task. Would it be less confusing
if
the log message said: "using 9 matched pairs" instead?
Thanks,
John
On Mon, Jun 3, 2019 at 11:40 AM Christina Kalb via RT
<met_help at ucar.edu>
wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
>
> HI John:
>
> I suppose the part I was confused about was the "9 pairs."
>
> Tina
>
> On Mon, Jun 3, 2019 at 11:36 AM John Halley Gotway via RT <
> met_help at ucar.edu>
> wrote:
>
> > Tina,
> >
> > I see you have a question about the following Point-Stat log
message:
> >
> > DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation
> type
> > MSG001, over region FULL, for interpolation method BILIN(4), using
9
> pairs.
> >
> > There is nothing to be concerned about here. For each
verification task
> > you request in the config file (where a vx task is a combination
of
> > forecast variable/level, verifying point observation message type,
> masking
> > region, and interpolation method), Point-Stat loops through the
point
> > observations and selects the ones which apply. In this case,
Point-Stat
> > found 9 point observations for this vx task based on your
configuration
> > settings. So that "9 pairs" means that that's the number of
matched
> pairs
> > that will be used in the computation of statistics for this task.
> >
> > The "BILIN(4)" means that bilinear interpolation is being used.
You're
> > correct, bilinear interpolation always uses a 2x2 box = 4 grid
points.
> >
> > Thanks,
> > John
> >
> > On Thu, May 30, 2019 at 3:44 PM Minna Win via RT
<met_help at ucar.edu>
> > wrote:
> >
> > >
> > > Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> > > Transaction: Given to johnhg (John Halley Gotway) by minnawin
> > > Queue: met_help
> > > Subject: point_stat interpolation
> > > Owner: johnhg
> > > Requestors: kalb at ucar.edu
> > > Status: open
> > > Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403
> >
> > >
> > >
> > > This transaction appears to have no content
> > >
> >
> >
>
> --
> *************************************************
> Christina Kalb
> Associate Scientist
> National Center for Atmospheric Research
> 3450 Mitchell Lane
> Boulder, CO 80301
> kalb at ucar.edu
> 303-497-2819
> *************************************************
>
>
------------------------------------------------
Subject: point_stat interpolation
From: Christina Kalb
Time: Mon Jun 03 12:02:11 2019
Yes. That would definitely be less confusing! I was thinking that
related
to the interpolation, but it sounds like it relates to the number of
stations, which makes sense!
Tina
On Mon, Jun 3, 2019 at 11:59 AM John Halley Gotway via RT
<met_help at ucar.edu>
wrote:
> Tina,
>
> Yep, in Point-Stat, we call a paired forecast and observation value
a
> "matched pair". The log message just indicates that Point-Stat has
found 9
> matched pairs for this verification task. Would it be less
confusing if
> the log message said: "using 9 matched pairs" instead?
>
> Thanks,
> John
>
> On Mon, Jun 3, 2019 at 11:40 AM Christina Kalb via RT
<met_help at ucar.edu>
> wrote:
>
> >
> > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
> >
> > HI John:
> >
> > I suppose the part I was confused about was the "9 pairs."
> >
> > Tina
> >
> > On Mon, Jun 3, 2019 at 11:36 AM John Halley Gotway via RT <
> > met_help at ucar.edu>
> > wrote:
> >
> > > Tina,
> > >
> > > I see you have a question about the following Point-Stat log
message:
> > >
> > > DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation
> > type
> > > MSG001, over region FULL, for interpolation method BILIN(4),
using 9
> > pairs.
> > >
> > > There is nothing to be concerned about here. For each
verification
> task
> > > you request in the config file (where a vx task is a combination
of
> > > forecast variable/level, verifying point observation message
type,
> > masking
> > > region, and interpolation method), Point-Stat loops through the
point
> > > observations and selects the ones which apply. In this case,
> Point-Stat
> > > found 9 point observations for this vx task based on your
configuration
> > > settings. So that "9 pairs" means that that's the number of
matched
> > pairs
> > > that will be used in the computation of statistics for this
task.
> > >
> > > The "BILIN(4)" means that bilinear interpolation is being used.
You're
> > > correct, bilinear interpolation always uses a 2x2 box = 4 grid
points.
> > >
> > > Thanks,
> > > John
> > >
> > > On Thu, May 30, 2019 at 3:44 PM Minna Win via RT
<met_help at ucar.edu>
> > > wrote:
> > >
> > > >
> > > > Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> > > > Transaction: Given to johnhg (John Halley Gotway) by minnawin
> > > > Queue: met_help
> > > > Subject: point_stat interpolation
> > > > Owner: johnhg
> > > > Requestors: kalb at ucar.edu
> > > > Status: open
> > > > Ticket <URL:
> https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403
> > >
> > > >
> > > >
> > > > This transaction appears to have no content
> > > >
> > >
> > >
> >
> > --
> > *************************************************
> > Christina Kalb
> > Associate Scientist
> > National Center for Atmospheric Research
> > 3450 Mitchell Lane
> > Boulder, CO 80301
> > kalb at ucar.edu
> > 303-497-2819
> > *************************************************
> >
> >
>
>
--
*************************************************
Christina Kalb
Associate Scientist
National Center for Atmospheric Research
3450 Mitchell Lane
Boulder, CO 80301
kalb at ucar.edu
303-497-2819
*************************************************
------------------------------------------------
Subject: point_stat interpolation
From: John Halley Gotway
Time: Mon Jun 03 12:03:59 2019
Tina,
OK, I'll go change that log message in Point-Stat now for the next
release.
Thanks,
John
On Mon, Jun 3, 2019 at 12:02 PM Christina Kalb via RT
<met_help at ucar.edu>
wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
>
> Yes. That would definitely be less confusing! I was thinking that
related
> to the interpolation, but it sounds like it relates to the number of
> stations, which makes sense!
>
> Tina
>
> On Mon, Jun 3, 2019 at 11:59 AM John Halley Gotway via RT <
> met_help at ucar.edu>
> wrote:
>
> > Tina,
> >
> > Yep, in Point-Stat, we call a paired forecast and observation
value a
> > "matched pair". The log message just indicates that Point-Stat
has
> found 9
> > matched pairs for this verification task. Would it be less
confusing if
> > the log message said: "using 9 matched pairs" instead?
> >
> > Thanks,
> > John
> >
> > On Mon, Jun 3, 2019 at 11:40 AM Christina Kalb via RT
<met_help at ucar.edu
> >
> > wrote:
> >
> > >
> > > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
> > >
> > > HI John:
> > >
> > > I suppose the part I was confused about was the "9 pairs."
> > >
> > > Tina
> > >
> > > On Mon, Jun 3, 2019 at 11:36 AM John Halley Gotway via RT <
> > > met_help at ucar.edu>
> > > wrote:
> > >
> > > > Tina,
> > > >
> > > > I see you have a question about the following Point-Stat log
message:
> > > >
> > > > DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation
> > > type
> > > > MSG001, over region FULL, for interpolation method BILIN(4),
using 9
> > > pairs.
> > > >
> > > > There is nothing to be concerned about here. For each
verification
> > task
> > > > you request in the config file (where a vx task is a
combination of
> > > > forecast variable/level, verifying point observation message
type,
> > > masking
> > > > region, and interpolation method), Point-Stat loops through
the point
> > > > observations and selects the ones which apply. In this case,
> > Point-Stat
> > > > found 9 point observations for this vx task based on your
> configuration
> > > > settings. So that "9 pairs" means that that's the number of
matched
> > > pairs
> > > > that will be used in the computation of statistics for this
task.
> > > >
> > > > The "BILIN(4)" means that bilinear interpolation is being
used.
> You're
> > > > correct, bilinear interpolation always uses a 2x2 box = 4 grid
> points.
> > > >
> > > > Thanks,
> > > > John
> > > >
> > > > On Thu, May 30, 2019 at 3:44 PM Minna Win via RT
<met_help at ucar.edu>
> > > > wrote:
> > > >
> > > > >
> > > > > Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> > > > > Transaction: Given to johnhg (John Halley Gotway) by
minnawin
> > > > > Queue: met_help
> > > > > Subject: point_stat interpolation
> > > > > Owner: johnhg
> > > > > Requestors: kalb at ucar.edu
> > > > > Status: open
> > > > > Ticket <URL:
> > https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403
> > > >
> > > > >
> > > > >
> > > > > This transaction appears to have no content
> > > > >
> > > >
> > > >
> > >
> > > --
> > > *************************************************
> > > Christina Kalb
> > > Associate Scientist
> > > National Center for Atmospheric Research
> > > 3450 Mitchell Lane
> > > Boulder, CO 80301
> > > kalb at ucar.edu
> > > 303-497-2819
> > > *************************************************
> > >
> > >
> >
> >
>
> --
> *************************************************
> Christina Kalb
> Associate Scientist
> National Center for Atmospheric Research
> 3450 Mitchell Lane
> Boulder, CO 80301
> kalb at ucar.edu
> 303-497-2819
> *************************************************
>
>
------------------------------------------------
Subject: point_stat interpolation
From: John Halley Gotway
Time: Mon Jun 03 12:10:14 2019
OK, I just committed it. The log messages in Series-Analysis already
said
"matched pairs"... and now the ones in Point-Stat, Grid-Stat, and
Ensemble-Stat do as well.
John
On Mon, Jun 3, 2019 at 12:07 PM Christina Kalb via RT
<met_help at ucar.edu>
wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
>
> Yes. That would definitely be less confusing! I was thinking that
related
> to the interpolation, but it sounds like it relates to the number of
> stations, which makes sense!
>
> Tina
>
> On Mon, Jun 3, 2019 at 11:59 AM John Halley Gotway via RT <
> met_help at ucar.edu>
> wrote:
>
> > Tina,
> >
> > Yep, in Point-Stat, we call a paired forecast and observation
value a
> > "matched pair". The log message just indicates that Point-Stat
has
> found 9
> > matched pairs for this verification task. Would it be less
confusing if
> > the log message said: "using 9 matched pairs" instead?
> >
> > Thanks,
> > John
> >
> > On Mon, Jun 3, 2019 at 11:40 AM Christina Kalb via RT
<met_help at ucar.edu
> >
> > wrote:
> >
> > >
> > > <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403 >
> > >
> > > HI John:
> > >
> > > I suppose the part I was confused about was the "9 pairs."
> > >
> > > Tina
> > >
> > > On Mon, Jun 3, 2019 at 11:36 AM John Halley Gotway via RT <
> > > met_help at ucar.edu>
> > > wrote:
> > >
> > > > Tina,
> > > >
> > > > I see you have a question about the following Point-Stat log
message:
> > > >
> > > > DEBUG 2: Processing TMP/Z2 versus air_temperature/Z2, for
observation
> > > type
> > > > MSG001, over region FULL, for interpolation method BILIN(4),
using 9
> > > pairs.
> > > >
> > > > There is nothing to be concerned about here. For each
verification
> > task
> > > > you request in the config file (where a vx task is a
combination of
> > > > forecast variable/level, verifying point observation message
type,
> > > masking
> > > > region, and interpolation method), Point-Stat loops through
the point
> > > > observations and selects the ones which apply. In this case,
> > Point-Stat
> > > > found 9 point observations for this vx task based on your
> configuration
> > > > settings. So that "9 pairs" means that that's the number of
matched
> > > pairs
> > > > that will be used in the computation of statistics for this
task.
> > > >
> > > > The "BILIN(4)" means that bilinear interpolation is being
used.
> You're
> > > > correct, bilinear interpolation always uses a 2x2 box = 4 grid
> points.
> > > >
> > > > Thanks,
> > > > John
> > > >
> > > > On Thu, May 30, 2019 at 3:44 PM Minna Win via RT
<met_help at ucar.edu>
> > > > wrote:
> > > >
> > > > >
> > > > > Thu May 30 15:43:58 2019: Request 90403 was acted upon.
> > > > > Transaction: Given to johnhg (John Halley Gotway) by
minnawin
> > > > > Queue: met_help
> > > > > Subject: point_stat interpolation
> > > > > Owner: johnhg
> > > > > Requestors: kalb at ucar.edu
> > > > > Status: open
> > > > > Ticket <URL:
> > https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=90403
> > > >
> > > > >
> > > > >
> > > > > This transaction appears to have no content
> > > > >
> > > >
> > > >
> > >
> > > --
> > > *************************************************
> > > Christina Kalb
> > > Associate Scientist
> > > National Center for Atmospheric Research
> > > 3450 Mitchell Lane
> > > Boulder, CO 80301
> > > kalb at ucar.edu
> > > 303-497-2819
> > > *************************************************
> > >
> > >
> >
> >
>
> --
> *************************************************
> Christina Kalb
> Associate Scientist
> National Center for Atmospheric Research
> 3450 Mitchell Lane
> Boulder, CO 80301
> kalb at ucar.edu
> 303-497-2819
> *************************************************
>
>
------------------------------------------------
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