[Thread Prev][Thread Next][Index]
[ferret_users] finding monthly maximum in daily data [regriding problem]
- To: ferret <ferret_users@xxxxxxxx>
- Subject: [ferret_users] finding monthly maximum in daily data [regriding problem]
- From: Peter Szabo <szabpet83@xxxxxxxxx>
- Date: Tue, 25 Nov 2008 14:52:58 +0100
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:mime-version:content-type; bh=hf3822i3HAoxzZ80ch5lBBiYWb20n6GJz35xQY2evVE=; b=UBv9Cg0Y0HclZvCPj7ySLBASkdVNYs5n3TV3WHaP0MGgWqYN2Stv2kNFq9I6HJVPfZ VEFheteh/VW9MXeEfLVQ43QhxWXKz+aiZgnTAH80WfJmSN9FMF1Vrz/5TTxAbopcUIuZ tWw5PAPf1VXhP5+89eK+HXtj8/WllLNdBtFdA=
- Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type; b=XaV5Ssi8QlFTD1r5a2GkNG8o9aC/FIFPmQdzXiBc77YvBvFVm0YPm0/gVO0OLjerKe 0tErDITGRlZ4VMoomzLCTMajsiTI6oW0/e9PZp16qLmUeL12LrX2AsVRqdbqEc55Rdgn OAZfh5Sz/DEfjbiVsM3jM27/5M1RTq2kwkOA4=
- Sender: owner-ferret_users@xxxxxxxx
Dear Ferret Users,
Im totally confused about creating appropriate time-axes: i would like to get monthly maximum precipitation from daily data set.
Here are some details of my original data set:
yes? sh axis/t=1-jan-1961:3-jan-1961 tax
name axis # pts start end
TAX TIME 14610 r 01-JAN-1961 00:00 31-DEC-2000 00:00
T0 = 15-JAN-1901 00:00:00
Axis span (to cell edges) = 350640
L T TBOX TBOXLO TSTEP (HOURS)
1> 01-JAN-1961 00:00:00 24 31-DEC-1960 12:00:00 525624
2> 02-JAN-1961 00:00:00 24 01-JAN-1961 12:00:00 525648
3> 03-JAN-1961 00:00:00 24 02-JAN-1961 12:00:00 525672
When i try to find the monthly maximum value through regriding to monthly data with the below command, i just cant have the correct values.
def axis/t="15-JAN-1961":"15-DEC-2000"/np=480 tmonthly
let premmax=pre[gt=tmonthly@max]
I also tried creating the time axis with "/edges" and some others also.
def axis/t="15-JAN-1961":"15-DEC-2000"/np=480/edges tmonthly
def axis/t="1-JAN-1961:00:00":"31-DEC-2000:00:00"/t0="1-JAN-1961:00:00"/np=480/edges/units=days tmonthly
etc.
None of them gave what i expected.
I enclose the original daily data set (HU_predaily.gif) and one of the plots after regriding (HU_premax_tmonthly.gif). The maximum on the original plot is 33.75 and on the others they are always bigger (around 37).
Can anyone help me?
Thanks in advance,
Peter Szabo
Attachment:
HU_predaily.gif
Description: GIF image
Attachment:
HU_premax_tmonthly.gif
Description: GIF image
[Thread Prev][Thread Next][Index]
Contact Us
Dept of Commerce /
NOAA /
OAR /
PMEL /
TMAP
Privacy Policy | Disclaimer | Accessibility Statement