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Thanks Paulo,
In addition, though, we're always happy to get requests to add
convenient functions. There's no reason we couldn't have a
TAX_TO_YYYYMMDDstring - or something. I'll look at that; it could
be released as an external function, even outside of the official
Ferret releases.
The other way I've done this kind of thing is with several
definitions to make the pieces of the date string, and then put them
together.
IF `ymd[k=2] GE 10` then DEFINE SYMBOL mo = `ymd[k=2]` ELSE
DEFINE SYMBOL mo = 0`ymd[k=2]`
IF `ymd[k=3] GE 10` then DEFINE SYMBOL da = `ymd[k=3]` ELSE
DEFINE SYMBOL da = 0`ymd[k=3]`
etc.
On 1/31/2017 3:20 AM, Paulo B. Oliveira
wrote:
Hi,
I must be missing something... doesn't the "ZW" keyword in
embedded expressions do the trick ?
def ax/t="10-jul-1987 12:00":"30-may-2016
12:00":1/unit=day/t0=1-jan-1900 t28y
let ymd = DAYS1900TOYMDHMS(t[gt=t28y])
def sym url0 http://data.remss.com
repeat/l=1:`ymd,ret=lend` (\
def sym path ccmp/v02.0/y`ymd[k=1],ZW=4`/M`ymd[k=2],ZW=2`;\
def sym fn
CCMP_Wind_Analysis_`ymd[k=1],ZW=4``ymd[k=2],ZW=2``ymd[k=3],ZW=2`_V02.0_L3.0_RSS.nc;\
sp wget ($url0)/($path)/($fn);\
)
On Tue, 2017-01-31 at 17:45 +0900, Ryo Furue wrote:
Hi Billy and ferret users,
On Tue, Jan 31, 2017 at 4:57 PM, William
Kessler <william.s.kessler@xxxxxxxx>
wrote:
RSS has released a new version (v2) of the CCMP
wind product, consistently analyzed from Jul 1987 through May
2016 (http://www.remss.com/measurements/ccmp).
As far as I can tell, this is only available from them, and
only by ftp-ing the individual daily files.
The whole global, 28-year fields are more than 285Gb. I want
to write a script that will loop through the 10563 days, make
daily averages from the four 6-hr values in each file, select
my region of interest, and append that to a much smaller file
(then delete the ftp-ed file).
(Yes, I'll probably have to run it in chunks over several
nights).
My problem is to generate the filenames, which look like the
example below:
CCMP_Wind_Analysis_19910825_V02.0_L3.0_RSS.nc
It's pretty straightforward to define a daily time axis
spanning the CCMP dates, REPEAT-loop on the days, and come up
with the year/month/day number needed for the filename (e.g.
DAYS1900TOYMDHMS). But can anyone sugest a simple way to
construct the filename given the need to have leading zeroes
for months before October and days of the month less than 10?
Would you be happy with a solution that combines ferret with
another scripting language such as below? The idea is to
generate the filename outside and pass it to Ferret as an
argument.
Ryo
----------------------------
# I just took it from the Internet and
modified it.
# Run it as
# $ sh thisscript
# on the command line.
#!/bin/sh
startdate=1987-01-01
#enddate=2016-05-31
enddate=1987-03-01
# GNU date command
#gdate=/usr/local/bin/gnu/date
gdate=gdate
curr="$startdate"
while true; do
echo ferret -script yourscript.jnl "$curr" #<-- remove
"echo" to run ferret
[ "$curr" \< "$enddate" ] || break
curr=$( $gdate +%Y-%m-%d --date "$curr +1 day" )
done
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