[gradsusr] Uncorrect time value in sdfwrite

[Andrew Friedman]

Hi Boyin,

One option is to use the NCO utilities (http://nco.sourceforge.net/nco.html) to change the starting time and time units. 

Here’s an example of changing time from seconds to minutes, and the starting time to 1979:
ncap2 -O -s "time=time/(60)" -s "time at units=\"minutes since 1979-01-01 00:00:00\"" $infile $infile
[I imagine that for changing from minutes to months you’ll need to use a loop for different lengths of month].

-Andrew

> On May 21, 2018, at 4:31 PM, Boyin Huang - NOAA Federal <boyin.huang at noaa.gov> wrote:
> 
> Hi Jennifer and Andrew,
> 
> Thanks a lot. Indeed, if I write necdf by "set t 1 last", I got the right time values (first value is zero) in unit of minute. The question is whether I can change the unit into "month" instead of minute.
> 
> ​By "set t num", the​ time value is always zero. I hope that I can change the starting time by the attribute setting like this:
> 'set sdfattr time char units months since 1854-01-15 00:00:00'
> -- 
> Boyin Huang, Room-468
> NOAA/NCEI/CCOG
> Asheville, NC.
> 828-271-4851