On Mon, Dec 1, 2014 at 10:37 PM, Timothy Waters wrote:

Hi,

There are several ways, but assuming you have vtk files as in the example here http://yt-project.org/doc/examining/loading_data.html?highlight=athena this function returns a dictionary of specified variables:

def get2DAthenaData(vtk_file,variables): data = {} ds = yt.load(vtk_file) gs = ds.index.select_grids(ds.index.max_level) grid = gs[0] #assuming SMR wasn't used

If you *did* use SMR, you can construct a fixed resolution covering grid or smoothed covering grid. The examples in the docs use 3D data, but it should work with 2D data as well. http://yt-project.org/doc/examining/low_level_inspection.html#examining-grid...

for var in variables: data[var] = grid[var][:,:,0] return data

Example usage: data = get2DAthenaData('kh.0010.vtk', ['density','pressure','vorticity_z']) rho = data['density'] p = data['pressure'] w = data['vorticity_z'] So if you just want to have access to 1D profiles to compare with a 1D solution, rho[:,0] would be the 1D density profile along x at the first y index.

If you instead want to make 2D images, you can just generate the dataset ds and then look into FixedResolutionBuffer.

-Tim

On Sat, Nov 29, 2014 at 12:51 PM, almog yalin wrote:

...

Hi.

I ran a 2D simulation with Athena and exported the data to vtk files. I was even able to load the file with yt and inspect some of its elements. What I would like to do is to compare the density from the simulation to an analytic solution (which I can evaluate at the grid points). The problem is I cannot figure out how to extract the relevant information from the yt.frontends.athena.data_structures.AthenaDataset object. What I expect are 2d arrays of the x coordinate, y coordinate and density.

Thanks in Advance, Almog

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