[yt-dev] Issue #1329: frb.data for OffAxisProjectionPlot giving back the exact same array for different fields (yt_analysis/yt)

[Christoph Federrath]

New issue 1329: frb.data for OffAxisProjectionPlot giving back the exact same array for different fields
https://bitbucket.org/yt_analysis/yt/issues/1329/frbdata-for-offaxisprojectionplot-giving

Christoph Federrath:

Hi there, 

I have been trying to get off axis projections, but I've wanted to plot the projects with my own code, so  have been using frb.data to retrieve the fields

eg.
weighted_proj = yt.OffAxisProjectionPlot(ds, L, ['velx', 'velz', 'magx', 'magz'], center=c, width=(x_width, 'AU'), depth=(args.slice_thickness, 'AU'), weight_field='density')

velx = weighted_proj.frb.data[('flash', 'velx')]
velz = weighted_proj.frb.data[('flash', 'velz')]
magx = weighted_proj.frb.data[('flash', 'magx')]
magz = weighted_proj.frb.data[('flash', 'magz')]

The output is all the same:
(Pdb) velx
ImageArray([[ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       ..., 
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914]]) code_length/code_time
(Pdb) velz
ImageArray([[ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       ..., 
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914]]) code_length/code_time
(Pdb) magx
ImageArray([[ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       ..., 
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914]]) code_magnetic
(Pdb) magz
ImageArray([[ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       [ 33142.74880205,  33142.74880205,  33142.74880205, ...,
         33175.42774805,  33175.42774805,  33175.42774805],
       ..., 
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914],
       [-33143.85074608, -33143.85074608, -33143.85074608, ...,
        -33172.57495914, -33172.57495914, -33172.57495914]]) code_magnetic

I mean, it gives back the correct units, but the array values are all identical between the different fields.