Dear Ferret users,
I am trying to compute a correlation between an observed current at one location (1D data: varies in time only) with SSH of a basin-wide region (2D data in x,y and time).
What I did is something like this:
-------------------
use daily-ssh.nc
use daily-current.nc
set mem/size=600
def axis/t=1-jan-2009:19-May-2010:1/unit=days tday
let ssh = sla[d=1, gt=tday]
let uvel = u[d=2, gt=tday]
let p = uvel
let q = ssh
go variance
shade correl
!
can data/a
can var/a
can mem
--------------------
But I got an error like:
-------
*** NOTE: Ambiguous coordinates on X axis: P*Q-P*Q + 1
*** NOTE: Ambiguous coordinates on X axis: Q*MASK_PQ
*** NOTE: Ambiguous coordinates on X axis: COVAR / (P_VAR_MASK*Q_VAR_MASK)^.5
*** NOTE: Ambiguous coordinates on X axis: P_DEV_MASK * Q_DEV_MASK
**ERROR: dimensions improperly specified: must be a 2D region
--------
If I change between P and Q, I will get an error like:
--------
*** NOTE: Ambiguous coordinates on X axis: P*Q-P*Q + 1
*** NOTE: Ambiguous coordinates on X axis: Q*MASK_PQ
*** NOTE: Ambiguous coordinates on X axis: COVAR / (P_VAR_MASK*Q_VAR_MASK)^.5
*** NOTE: Ambiguous coordinates on X axis: P_DEV_MASK * Q_DEV_MASK
**ERROR: inconsistent sizes of data regions: X axis
Q has 3 points (I=0:2)
_expression_ has 301 points (I=001:301)
---------
Do you have any suggestion?
Thank you for help.
Best regards,
Iskhaq
---------------------------------------------------------------- Dr. Iskhaq Iskandar Jurusan Fisika, Fakultas MIPA Universitas Sriwijaya Kampus Inderalaya, Ogan Ilir (OI) Sumatra Selatan, 30662 INDONESIA Phone: +62 (711) 580743 Fax: +62 (711) 580268 E-mail: iskhaq.iskandar@xxxxxxxxx http://iskhaq.wordpress.com/ ----------------------------------------------------------------