[ferret_users] **ERROR: inconsistent sizes of data regions: X axis

[Bob Tomas <tomas@xxxxxxxx>]

I am calculating the divergence from U and V:

	use  U_p.f30.100c_br1.cam2.h1.0350_0369-05-01_10-31_emean.nc
	use "../../f30.101a_br1/stats/U_p.f30.101a_br1.cam2.h1.0250_0269-05-01_10-31_emean.nc"
	let au = 'U'[d=2]-'U'[d=1]

	use  V_p.f30.100c_br1.cam2.h1.0350_0369-05-01_10-31_emean.nc
	use "../../f30.101a_br1/stats/V_p.f30.101a_br1.cam2.h1.0250_0269-05-01_10-31_emean.nc"
	let av = 'V'[d=4]-'V'[d=3]

	let div = au[i=1:128@ddc] + av[j=1:64@ddc]


I can plot the entire field:

	fill div[k=1,l=1]

But if I try to plot a sub-region:


	fill div[x=-30:60,y=-20:40,k=1,l=1]


I am told:

	 **ERROR: inconsistent sizes of data regions: X axis
          AV[J=1:64@DDC] has 11 points (I=118:128)
          expression has 128 points (I=001:128)


I'm not sure what to make of this.  Any suggestions?

Thanks

Bob

--
-------------------------------------------------------------
Robert A. Tomas
National Center for Atmospheric Research
Climate and Global Dynamics Division - Paleoclimatology
1850 Table Mesa Drive
Boulder, CO 80305-3000
e-mail: tomas@ucar.edu  tel: 303-497-1342  fax:  303-497-1348