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Work with Scientific Data Format files in Python

Project description

SDF is a Python package to read, write and interpolate multi-dimensional data. The Scientific Data Format is an open file format based on HDF5 to store multi-dimensional data such as parameters, simulation results or measurements. It supports…

  • very large files
  • up to 32 dimensions
  • hierarchical structure
  • units, comments and custom meta-information

For detailed information see the SDF specification.

Installation

To install the latest release from PyPI or update an existing installation:

python -m pip install --upgrade sdf

To install the latest development version:

python -m pip install --upgrade https://github.com/ScientificDataFormat/SDF-Python/archive/develop.zip

Tutorial

Import the SDF and NumPy packages:

>>> import sdf
>>> import numpy as np

Create the data arrays:

>>> t = np.linspace(0, 10, 51)
>>> v = np.sin(t)

Create the datasets:

>>> ds_t = sdf.Dataset('t', data=t, unit='s', is_scale=True, display_name='Time')
>>> ds_v = sdf.Dataset('v', data=v, unit='V', scales=[ds_t])

Create the root group and write the file:

>>> g = sdf.Group('/', comment='A sine voltage', datasets=[ds_t, ds_v])
>>> sdf.save('sine.sdf', g)

Read the dataset from the SDF file asserting the correct unit of the dataset and scale:

>>> ds_v2 = sdf.load('sine.sdf', '/v', unit='V', scale_units=['s'])

Get the meta info and data array from the dataset:

>>> ds_v2.unit
'V'
>>> ds_v2.data.shape
(51,)

Get the scale for the first dimension:

>>> ds_t2 = ds_v2.scales[0]
>>> ds_t2.unit
's'

© 2020 Dassault Systèmes

Project details


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