Re: [yt-users] writing to a file

Thanks! I was not familiar with the converting to arrays step, looks very straightforward. Best, Stephanie On Thu, Jul 6, 2017 at 9:56 PM Nathan Goldbaum wrote:

On Thu, Jul 6, 2017 at 11:44 PM, Stephanie Tonnesen wrote:

...

Hi all,

I am trying to write a bunch of information from a gas-only single enzo output to a file for colleagues to read. I don't think they are familiar with HDF5, so I am hoping to write to a fits file. What I want to put in the file is the x,y,z coordinates, the x,y,z velocity, and the total energy of the gas--which is a user-defined function in my case. Ideally I also only want to include gas that has a tracer fraction of some value.

so basically I have something like:

ds = yt.load("file") galgas = ds.cut_region(["obj['Metal_Density']/obj['density'] > 0.1"])

To get the x, y, z position:

x = galgas['x'] y = galgas['y'] z = galgas['z']

And the velocity:

vx = galgas['velocity_x'] vy = galgas['velocity_y'] vz = galgas['velocity_z']

And your tnermal energy derived field:

te = galgas['your_te_field']

These will all be YTArrays. You can convert these to astropy quantities by doing:

vx = vx.to_astropy()

Or you could convert them to ndarrays:

vx = np.array(vx)

And then you could use astropy.io.fits to make a fits file from these arrays.

-Nathan

...

can I just create an array of the fields I want from galgas?

Thanks, Stephanie

-- Dr. Stephanie Tonnesen Alvin E. Nashman Postdoctoral Fellow Carnegie Observatories, Pasadena, CA stonnes@gmail.com

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-- -- Dr. Stephanie Tonnesen Alvin E. Nashman Postdoctoral Fellow Carnegie Observatories, Pasadena, CA stonnes@gmail.com