Hi John, When I change the tracerp25 selections to all have <= or >= symbols, the value basically doesn't change. With the gt/lt and equal-to "Ones" is definitely different: tracerp25 is 1099285 tdp25 is 2028955 So the selection criteria is definitely more stringent on tracerp25 = alld.cut_region(["grid[' specific_scalar[0]'] > 0.25","grid['z'] <= 0.1925","grid['z'] >= -0.1925","grid['cyl_Rcode'] <= 1.2"]) -Stephanie On Mon, Aug 4, 2014 at 2:11 PM, John ZuHone <jzuhone@gmail.com> wrote:
Hi Stephanie,
I suspect the problem is that these are not *exactly* the same regions. Have you tried checking the result of:
tdp25["Ones"].sum()
tracerp25["Ones"].sum()
which would be a quick way to determine the number of cells in each region.
What might be going on (but I have yet to verify) is that the disk selection container object is using >= and <= for the zone selection, whereas you used > and < in the definition of your cut region. You might try swapping those out and seeing if that changes things.
Best,
John Z
On Aug 4, 2014, at 1:15 PM, Stephanie Tonnesen <stonnes@gmail.com> wrote:
Hi all,
I am trying to get the total mass in a disk region of my simulation. I am using athena data and yt 2.7-dev. I thought I was defining the region in the same way using two methods:
alld = pf.h.all_data() tracerp25 = alld.cut_region(["grid['specific_scalar[0]'] > 0.25","grid['z'] < 0.1925","grid['z'] > -0.1925","grid['cyl_Rcode'] < 1.2"])
disk = pf.h.disk([0.0,0.0,0.0],[0.0,0.0,1.0],1.2,0.385) tdp25 = disk.cut_region(["grid['specific_scalar[0]'] > 0.25"])
but when I print the total mass I get answers that differ by 10%
print tracerp25.quantities["TotalQuantity"]("CellMassMsun") print tdp25.quantities["TotalQuantity"]("CellMassMsun")
[8019047231.5192223] [8886968784.4710732]
Can someone point out where my difference is?
Thanks!
Stephanie _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
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