[Met_help] [rt.rap.ucar.edu #99872] History for pcp_combine

[George McCabe via RT]

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  Initial Request
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Hello,

I am wondering how to change the default "valid_time" when using
pcp_combine? I tried to add -valid_time as below, but it doesn't work:

$ pcp_combine -derive mean  input*.nc  -field 'name="ash_mass_loading";
level="(*,*)";' -name "ash_mass_loading" -valid_time "20201021_000000" out
.nc


It seems by default the valid time in the mean file is the same as the one
from the last file in the file list, but can we just change that as we did
for changing the variable name (like -name)?


Thank you


Binyu


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  Complete Ticket History
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Subject: pcp_combine
From: George McCabe
Time: Wed May 12 13:03:24 2021

Hi Binyu,
You should be able to use the set_attr_valid option in the -field
argument.
This will override the timestamp of all of the input fields in
pcp_combine,
so the output should also contain the same valid time. I recommend
trying
this command:

pcp_combine -derive mean input*.nc -field 'name="ash_mass_loading";
level="(*,*)"; *set_attr_valid = "20201021_000000";*' -name
"ash_mass_loading" out.nc

Please let me know if this doesn't work and I can take a closer look.

Thanks,
George

On Wed, May 12, 2021 at 12:50 PM binyu.wang at noaa.gov via RT <
met_help at ucar.edu> wrote:

>
> Wed May 12 12:50:09 2021: Request 99872 was acted upon.
> Transaction: Ticket created by binyu.wang at noaa.gov
>        Queue: met_help
>      Subject: pcp_combine
>        Owner: Nobody
>   Requestors: binyu.wang at noaa.gov
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=99872 >
>
>
> Hello,
>
> I am wondering how to change the default "valid_time" when using
> pcp_combine? I tried to add -valid_time as below, but it doesn't
work:
>
> $ pcp_combine -derive mean  input*.nc  -field
'name="ash_mass_loading";
> level="(*,*)";' -name "ash_mass_loading" -valid_time
"20201021_000000" out
> .nc
>
>
> It seems by default the valid time in the mean file is the same as
the one
> from the last file in the file list, but can we just change that as
we did
> for changing the variable name (like -name)?
>
>
> Thank you
>
>
> Binyu
>
>

--
George McCabe - Software Engineer III
National Center for Atmospheric Research
Research Applications Laboratory
303-497-2768
---
My working day may not be your working day. Please do not feel obliged
to
reply to this email outside of your normal working hours.

------------------------------------------------
Subject: pcp_combine
From: binyu.wang at noaa.gov
Time: Wed May 12 14:28:23 2021

 Hello George,

That works. Thank you so much for your quick fix.

Binyu

On Wed, May 12, 2021 at 3:03 PM George McCabe via RT
<met_help at ucar.edu>
wrote:

> Hi Binyu,
> You should be able to use the set_attr_valid option in the -field
argument.
> This will override the timestamp of all of the input fields in
pcp_combine,
> so the output should also contain the same valid time. I recommend
trying
> this command:
>
> pcp_combine -derive mean input*.nc -field 'name="ash_mass_loading";
> level="(*,*)"; *set_attr_valid = "20201021_000000";*' -name
> "ash_mass_loading" out.nc
>
> Please let me know if this doesn't work and I can take a closer
look.
>
> Thanks,
> George
>
> On Wed, May 12, 2021 at 12:50 PM binyu.wang at noaa.gov via RT <
> met_help at ucar.edu> wrote:
>
> >
> > Wed May 12 12:50:09 2021: Request 99872 was acted upon.
> > Transaction: Ticket created by binyu.wang at noaa.gov
> >        Queue: met_help
> >      Subject: pcp_combine
> >        Owner: Nobody
> >   Requestors: binyu.wang at noaa.gov
> >       Status: new
> >  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=99872 >
> >
> >
> > Hello,
> >
> > I am wondering how to change the default "valid_time" when using
> > pcp_combine? I tried to add -valid_time as below, but it doesn't
work:
> >
> > $ pcp_combine -derive mean  input*.nc  -field
'name="ash_mass_loading";
> > level="(*,*)";' -name "ash_mass_loading" -valid_time
"20201021_000000"
> out
> > .nc
> >
> >
> > It seems by default the valid time in the mean file is the same as
the
> one
> > from the last file in the file list, but can we just change that
as we
> did
> > for changing the variable name (like -name)?
> >
> >
> > Thank you
> >
> >
> > Binyu
> >
> >
>
> --
> George McCabe - Software Engineer III
> National Center for Atmospheric Research
> Research Applications Laboratory
> 303-497-2768
> ---
> My working day may not be your working day. Please do not feel
obliged to
> reply to this email outside of your normal working hours.
>
>

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