[Met_help] [rt.rap.ucar.edu #76015] History for series-analysis question
Julie Prestopnik via RT
met_help at ucar.edu
Mon May 2 15:00:32 MDT 2016
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Initial Request
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The attached .ps file contains the output for the CTS score for 2m AGL temperature GE 285K.
I see some white areas depicted, but the color scale doesn't include white that I can tell. The only possibility is where the value for CTS is 0.000 and maybe the color assigned is white. Can you explain the meaning of the areas on the graphic which are colored white?
Thanks.
R/
John
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Complete Ticket History
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Subject: series-analysis question
From: Julie Prestopnik
Time: Thu Apr 21 10:56:07 2016
Hi John. You are correct that the white areas on the graphic are
where
the value is 0.000, as shown at the bottom of the color scale.
Using plot_data_plane, you do have the ability to change the range of
the
data to be plotted as a command line argument to plot_data_plane:
-plot_range
*min max*
You also have the ability to change the color table if you'd like,
also as
a command line argument to plot_data_plane:
-color_table *color_table_name*
You can see other color tables that MET has available at
met-5.1/share/met/colortables/.
I hope this helps!
Julie
On Thu, Apr 21, 2016 at 10:31 AM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> Thu Apr 21 10:31:42 2016: Request 76015 was acted upon.
> Transaction: Ticket created by john.w.raby2.civ at mail.mil
> Queue: met_help
> Subject: series-analysis question
> Owner: Nobody
> Requestors: john.w.raby2.civ at mail.mil
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
>
>
> The attached .ps file contains the output for the CTS score for 2m
AGL
> temperature GE 285K.
>
> I see some white areas depicted, but the color scale doesn't include
white
> that I can tell. The only possibility is where the value for CTS is
0.000
> and maybe the color assigned is white. Can you explain the meaning
of the
> areas on the graphic which are colored white?
>
> Thanks.
>
> R/
> John
>
>
>
--
Julie Prestopnik
National Center for Atmospheric Research
Research Applications Laboratory
Phone: 303.497.8399
Email: jpresto at ucar.edu
------------------------------------------------
Subject: RE: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-analysis question
From: Raby, John W USA CIV
Time: Thu Apr 21 12:09:17 2016
Julie -
Thanks for your response.
The other question I have is about the plotting of grid values of CTS
from the previous example. I looked at the grid values using ncdump
and there are values of CTS ge285 between 0 and 1, plus there are
values of -9999. How would plot_data_plane plot those? (i.e. color?)
When I produced the plot I sent you, I didn't use any of the special
arguments such as those you mention below. I just did the basic plot.
Thanks.
R/
John
________________________________________
From: Julie Prestopnik via RT [met_help at ucar.edu]
Sent: Thursday, April 21, 2016 10:56 AM
To: Raby, John W CIV USARMY RDECOM ARL (US)
Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-analysis
question
All active links contained in this email were disabled. Please verify
the identity of the sender, and confirm the authenticity of all links
contained within the message prior to copying and pasting the address
to a Web browser.
----
Hi John. You are correct that the white areas on the graphic are
where
the value is 0.000, as shown at the bottom of the color scale.
Using plot_data_plane, you do have the ability to change the range of
the
data to be plotted as a command line argument to plot_data_plane:
-plot_range
*min max*
You also have the ability to change the color table if you'd like,
also as
a command line argument to plot_data_plane:
-color_table *color_table_name*
You can see other color tables that MET has available at
met-5.1/share/met/colortables/.
I hope this helps!
Julie
On Thu, Apr 21, 2016 at 10:31 AM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> Thu Apr 21 10:31:42 2016: Request 76015 was acted upon.
> Transaction: Ticket created by john.w.raby2.civ at mail.mil
> Queue: met_help
> Subject: series-analysis question
> Owner: Nobody
> Requestors: john.w.raby2.civ at mail.mil
> Status: new
> Ticket <Caution-url: Caution-
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
>
>
> The attached .ps file contains the output for the CTS score for 2m
AGL
> temperature GE 285K.
>
> I see some white areas depicted, but the color scale doesn't include
white
> that I can tell. The only possibility is where the value for CTS is
0.000
> and maybe the color assigned is white. Can you explain the meaning
of the
> areas on the graphic which are colored white?
>
> Thanks.
>
> R/
> John
>
>
>
--
Julie Prestopnik
National Center for Atmospheric Research
Research Applications Laboratory
Phone: 303.497.8399
Email: jpresto at ucar.edu
------------------------------------------------
Subject: series-analysis question
From: John Halley Gotway
Time: Thu Apr 21 13:10:48 2016
Hi John,
This is John Halley Gotway. Thought I'd jump in here on this one.
I'm pretty sure you're talking about plotting values of CSI (i.e.
critical
success index). CTS is an abbreviation used in MET for "contingency
table
statistics". Grid-Stat and Point-Stat produce CTS output lines which
contain *many* contingency table statistics, including CSI. So when
you
say CTS, I suspect you really mean CSI.
The equation for CSI is listed in appendix C of the MET user's guide,
but
it's basically the (number of hits)/(number of hits + false alarms +
misses). If the denominator is 0, then CSI is undefined. And if the
threshold is set such that there are no events in the forecast or
observation fields, then the denominator will equal 0. MET stores bad
data
internally as a value of -9999. So when you look at the CSI, you'll
see
values of -9999 or between 0 and 1. So grid points where there are no
events in the forecast or observation data will have a value of -9999.
And the plot_data_plane tool is smart enough to check for bad data
values
and know what to do with them. Looking at the first line of the
default
MET color table, you'll see how -9999 is plotted:
head -1 share/met/colortables/met_default.ctable
-9999 { 150, 150, 150 } // -9999 indicates bad data
Those 3 numbers define a bad data as a shade of gray. Each number
there is
between 0 and 255 for red, green, and blue. You can easily switch to
a new
color table in plot_data_plane with the -color_table command line
option.
You can use a pre-existing colortable or define a new one yourself.
Hope that helps.
Thanks,
John
On Thu, Apr 21, 2016 at 12:09 PM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> <URL: https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
>
> Julie -
>
> Thanks for your response.
>
> The other question I have is about the plotting of grid values of
CTS from
> the previous example. I looked at the grid values using ncdump and
there
> are values of CTS ge285 between 0 and 1, plus there are values of
-9999.
> How would plot_data_plane plot those? (i.e. color?) When I produced
the
> plot I sent you, I didn't use any of the special arguments such as
those
> you mention below. I just did the basic plot.
>
> Thanks.
>
> R/
> John
> ________________________________________
> From: Julie Prestopnik via RT [met_help at ucar.edu]
> Sent: Thursday, April 21, 2016 10:56 AM
> To: Raby, John W CIV USARMY RDECOM ARL (US)
> Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-
analysis
> question
>
> All active links contained in this email were disabled. Please
verify the
> identity of the sender, and confirm the authenticity of all links
contained
> within the message prior to copying and pasting the address to a Web
> browser.
>
>
>
>
> ----
>
> Hi John. You are correct that the white areas on the graphic are
where
> the value is 0.000, as shown at the bottom of the color scale.
>
> Using plot_data_plane, you do have the ability to change the range
of the
> data to be plotted as a command line argument to plot_data_plane:
>
> -plot_range
>
> *min max*
> You also have the ability to change the color table if you'd like,
also as
> a command line argument to plot_data_plane:
>
> -color_table *color_table_name*
>
> You can see other color tables that MET has available at
> met-5.1/share/met/colortables/.
>
> I hope this helps!
>
> Julie
>
> On Thu, Apr 21, 2016 at 10:31 AM, Raby, John W USA CIV via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Thu Apr 21 10:31:42 2016: Request 76015 was acted upon.
> > Transaction: Ticket created by john.w.raby2.civ at mail.mil
> > Queue: met_help
> > Subject: series-analysis question
> > Owner: Nobody
> > Requestors: john.w.raby2.civ at mail.mil
> > Status: new
> > Ticket <Caution-url: Caution-
> https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
> >
> >
> > The attached .ps file contains the output for the CTS score for 2m
AGL
> > temperature GE 285K.
> >
> > I see some white areas depicted, but the color scale doesn't
include
> white
> > that I can tell. The only possibility is where the value for CTS
is 0.000
> > and maybe the color assigned is white. Can you explain the meaning
of the
> > areas on the graphic which are colored white?
> >
> > Thanks.
> >
> > R/
> > John
> >
> >
> >
>
>
> --
> Julie Prestopnik
> National Center for Atmospheric Research
> Research Applications Laboratory
> Phone: 303.497.8399
> Email: jpresto at ucar.edu
>
>
>
>
------------------------------------------------
Subject: RE: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-analysis question
From: Raby, John W USA CIV
Time: Thu Apr 21 14:14:52 2016
John -
Thanks for clarifying way plot_data_plane handles the cases where CSI
is undefined (rather than missing). For my data, I expect that for the
threshold of GE 285, there should have been instances in higher
elevations where there were no such events in either the fcst or obs
data. Based on your explanation, I'll take a look at the color table
settings using your guidance on how they are used. That information
will be very useful.
R/
John
________________________________________
From: John Halley Gotway via RT [met_help at ucar.edu]
Sent: Thursday, April 21, 2016 1:10 PM
To: Raby, John W CIV USARMY RDECOM ARL (US)
Subject: Re: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-
analysis question
All active links contained in this email were disabled. Please verify
the identity of the sender, and confirm the authenticity of all links
contained within the message prior to copying and pasting the address
to a Web browser.
----
Hi John,
This is John Halley Gotway. Thought I'd jump in here on this one.
I'm pretty sure you're talking about plotting values of CSI (i.e.
critical
success index). CTS is an abbreviation used in MET for "contingency
table
statistics". Grid-Stat and Point-Stat produce CTS output lines which
contain *many* contingency table statistics, including CSI. So when
you
say CTS, I suspect you really mean CSI.
The equation for CSI is listed in appendix C of the MET user's guide,
but
it's basically the (number of hits)/(number of hits + false alarms +
misses). If the denominator is 0, then CSI is undefined. And if the
threshold is set such that there are no events in the forecast or
observation fields, then the denominator will equal 0. MET stores bad
data
internally as a value of -9999. So when you look at the CSI, you'll
see
values of -9999 or between 0 and 1. So grid points where there are no
events in the forecast or observation data will have a value of -9999.
And the plot_data_plane tool is smart enough to check for bad data
values
and know what to do with them. Looking at the first line of the
default
MET color table, you'll see how -9999 is plotted:
head -1 share/met/colortables/met_default.ctable
-9999 { 150, 150, 150 } // -9999 indicates bad data
Those 3 numbers define a bad data as a shade of gray. Each number
there is
between 0 and 255 for red, green, and blue. You can easily switch to
a new
color table in plot_data_plane with the -color_table command line
option.
You can use a pre-existing colortable or define a new one yourself.
Hope that helps.
Thanks,
John
On Thu, Apr 21, 2016 at 12:09 PM, Raby, John W USA CIV via RT <
met_help at ucar.edu> wrote:
>
> <Caution-url: Caution-
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
>
> Julie -
>
> Thanks for your response.
>
> The other question I have is about the plotting of grid values of
CTS from
> the previous example. I looked at the grid values using ncdump and
there
> are values of CTS ge285 between 0 and 1, plus there are values of
-9999.
> How would plot_data_plane plot those? (i.e. color?) When I produced
the
> plot I sent you, I didn't use any of the special arguments such as
those
> you mention below. I just did the basic plot.
>
> Thanks.
>
> R/
> John
> ________________________________________
> From: Julie Prestopnik via RT [met_help at ucar.edu]
> Sent: Thursday, April 21, 2016 10:56 AM
> To: Raby, John W CIV USARMY RDECOM ARL (US)
> Subject: [Non-DoD Source] Re: [rt.rap.ucar.edu #76015] series-
analysis
> question
>
> All active links contained in this email were disabled. Please
verify the
> identity of the sender, and confirm the authenticity of all links
contained
> within the message prior to copying and pasting the address to a Web
> browser.
>
>
>
>
> ----
>
> Hi John. You are correct that the white areas on the graphic are
where
> the value is 0.000, as shown at the bottom of the color scale.
>
> Using plot_data_plane, you do have the ability to change the range
of the
> data to be plotted as a command line argument to plot_data_plane:
>
> -plot_range
>
> *min max*
> You also have the ability to change the color table if you'd like,
also as
> a command line argument to plot_data_plane:
>
> -color_table *color_table_name*
>
> You can see other color tables that MET has available at
> met-5.1/share/met/colortables/.
>
> I hope this helps!
>
> Julie
>
> On Thu, Apr 21, 2016 at 10:31 AM, Raby, John W USA CIV via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Thu Apr 21 10:31:42 2016: Request 76015 was acted upon.
> > Transaction: Ticket created by john.w.raby2.civ at mail.mil
> > Queue: met_help
> > Subject: series-analysis question
> > Owner: Nobody
> > Requestors: john.w.raby2.civ at mail.mil
> > Status: new
> > Ticket <Caution-Caution-url: Caution-
> Caution-https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=76015 >
> >
> >
> > The attached .ps file contains the output for the CTS score for 2m
AGL
> > temperature GE 285K.
> >
> > I see some white areas depicted, but the color scale doesn't
include
> white
> > that I can tell. The only possibility is where the value for CTS
is 0.000
> > and maybe the color assigned is white. Can you explain the meaning
of the
> > areas on the graphic which are colored white?
> >
> > Thanks.
> >
> > R/
> > John
> >
> >
> >
>
>
> --
> Julie Prestopnik
> National Center for Atmospheric Research
> Research Applications Laboratory
> Phone: 303.497.8399
> Email: jpresto at ucar.edu
>
>
>
>
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