[ncl-talk] error using yyyymmdd_to_yyyyfrac() NCL 6.1.2

[Alan Brammer]

Erik,
I don't have a real solution (just a simple workaround).

yyyymm_to_yyyyfrac utilises the function day_of_year()
<https://www.ncl.ucar.edu/Document/Functions/Built-in/day_of_year.shtml>
internally.  day_of_year
<https://www.ncl.ucar.edu/Document/Functions/Built-in/day_of_year.shtml> as
you'll see on the documentation page doesn't support the
proleptic_gregorian calendar.

My suggestion for you for now would be to convert the time units to a
calendar that is supported by day_of_year, and then continue.   cd_convert
will currently by default convert to a "standard" calendar this should then
work in yyyymm_to_yyyyfrac

Just need to add 1 line and edit the next. see below.


standard_time = cd_convert(eof_ts&time, eof_ts&time at units)
timeRec= cd_calendar(standard_time,2)



~Alan.


On Mon, Feb 23, 2015 at 8:43 PM, Erik Jan Schaffernicht <
eschaffe at uni-koeln.de> wrote:

> Additional remark:  I updated now to most recent NCL,i.e. version 6.2.1
>  but I still have the same error and problem.
>
>
> I am using these functions:
> eof_ts()  runs successful on a climate model output.
> Then I take
> timeRec= cd_calendar(eof_ts&time,2)
> and
> printVarSummary(timeRec) gives me:
>      Variable: timeRec
>      Type: double
>      Total Size: 292192 bytes
>                  36524 values
>      Number of Dimensions: 1
>      Dimensions and sizes:    [36524]
>      Coordinates:
>      Number Of Attributes: 1
>        calendar :    proleptic_gregorian
>
> Then I like to plot the time series (~36500 days = ~100years) so I like to
> convert the time from YYYYMMDD to YYYY.fraction
> yearFrac= yyyymmdd_to_yyyyfrac(timeRec,0.)
>
> This last step causes these errors:   Any idea/help/solution?
>
> [... many more of these illegal calendar  errors lines, I did not copy all
> due to redundancy ...]
> day_of_year: illegal calendar = 'proleptic_gregorian'
> day_of_year: illegal calendar = 'proleptic_gregorian'
> day_of_year: illegal calendar = 'proleptic_gregorian'
> day_of_year: illegal calendar = 'proleptic_gregorian'
> day_of_year: illegal calendar = 'proleptic_gregorian'
> isleapyear: illegal calendar = 'proleptic_gregorian'
> fatal:Undefined identifier: (con) is undefined, can't continue
> fatal:["Execute.c":8567]:Execute: Error occurred at or near line 7801 in
> file $NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl
>
>
> A few minutes before I used   yyyymm_to_yyyyfrac( )   on a similar file
> that is monthly averaged.  There, using the yyyymm_to_...(), this function
> does not cause any error.
>
>
>
>
>
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