pyramis 0.1.12

A python-based ramses analyzer for minimalist

Pyramis: Python Reader for Adaptive Mesh Interface Simulations

A python library, to provide essential and efficient framework for management and analysis of the adaptive mesh simulation such as RAMSES.

Installing

Using pip

pip install pyramis

Using developement mode

git clone https://github.com/sanhancluster/pyramis
cd pyramis
pip install -e .

How to use

Reading RAMSES raw data

pyramis uses multi-threading (concurrent.futures.ThreadPoolExecutor) by default for reading RAMSES simulation data. Number of workers will be automatically decided by the available resources when the package is imported.

The particle data

You can read particle data directly from specific region by following commands.

import pyramis as pr
ramses_path = '/path/to/ramses/' # path to the directory where output_* are located
region = [[0.4, 0.6], [0.4, 0.6], [0.4, 0.6]] # targeting box in code unit
part = pr.ramses.read_part(ramses_path, iout=1, region=region) # reads output_00001
print(f"Total particle mass within the box is {np.sum(part['m'])}") # in code unit

For a particular type of particles, part_type option can be used

part = pr.ramses.read_part(ramses_path, iout=1, part_type='star')

The cell data

You can read all cells from specific region by following commands.

ramses_path = '/path/to/ramses/' # path to the directory where output_* are located
region = [[0.4, 0.6], [0.4, 0.6], [0.4, 0.6]] # targeting box in code unit
cell = pr.ramses.read_cell(ramses_path, iout=1, region=region)
print(f"Mean gas density within the box is {np.mean(cell['rho'])}") # in code unit

Reading RAMSES HDF format data

The particle and cell data

HDF format requires particle type to be specified.

hdf_path = '/path/to/hdf/' # path to the directory where part_*.h5, cell_*.h5 are located
region = [[0.4, 0.6], [0.4, 0.6], [0.4, 0.6]] # targeting box in code unit
part = pr.hdf.read_part(hdf_path, part_type='star', iout=1, region=region)
cell = pr.hdf.read_cell(hdf_path, iout=1, region=region)

Reading HaloMaker data

DM Halo and Galaxy Catalog

halomaker_path = '/path/to/halos/' # path the directory where tree_bricks* are located
halo = pr.halo_finder.read_halomaker(halomaker_path, iout=1)
galaxy = pr.halo_finder.read_halomaker(galaxymaker_path, iout=1, galaxy=True)