Utilities and datasets for deep learning in genomics
Project description
Janggu is a python package that facilitates deep learning in the context of genomics. The package is freely available under a GPL-3.0 license.
In particular, the package allows for easy access to typical Genomics data formats and out-of-the-box evaluation so that you can concentrate on designing the neural network architecture for the purpose of quickly testing biological hypothesis. A comprehensive documentation is available here.
Hallmarks of Janggu:
Janggu provides special Genomics datasets that allow you to access raw data in FASTA, BAM, BIGWIG, BED and GFF file format.
Various normalization procedures are supported for dealing with of the genomics dataset, including ‘TPM’, ‘zscore’ or custom normalizers.
The dataset are directly consumable with neural networks implemented in keras.
Numpy format output of a keras model can be converted to represent genomic coverage tracks, which allows exporting the predictions as BIGWIG files and visualization of genome browser-like plots.
Genomic datasets can be stored in various ways, including as numpy array, sparse dataset or in hdf5 format.
Caching of Genomic datasets avoids time consuming preprocessing steps and facilitates fast reloading.
Janggu provides a wrapper for keras models with built-in logging functionality and automatized result evaluation.
Janggu provides a special keras layer for scanning both DNA strands for motif occurrences.
Janggu provides keras models constructors that automatically infer input and output layer shapes to reduce code redundancy.
Janggu provides a web application that allows to browse through the results.
Why the name Janggu?
Janggu is a Korean percussion instrument that looks like an hourglass.
Like the two ends of the instrument, the philosophy of the Janggu package is to help with the two ends of a deep learning application in genomics, namely data acquisition and evaluation.
Installation
The simplest way to install janggu is via the conda package management system. Assuming you have already installed conda, create a new environment and type
pip install janggu
The janggu neural network model depends on tensorflow which you have to install depending on whether you want to use GPU support or CPU only. To install tensorflow type
conda install tensorflow # or tensorflow-gpu
Further information regarding the installation of tensorflow can be found on the official tensorflow webpage
To verify that the installation works try to run the example contained in the janggu package as follows
git clone https://github.com/BIMSBbioinfo/janggu cd janggu python ./src/examples/classify_fasta.py single
Changelog
0.8.4 (2018-12-11)
Updated installation instructions in the readme
0.8.3 (2018-12-05)
Fixed issues for loading SparseGenomicArray
Made GenomicIndexer.filter_by_region aware of flank
Fixed BedLoader of partially overlapping ROI and bedfiles issue using filter_by_region.
Adapted classifier, license and keywords in setup.py
Fixed hyperlinks
0.8.2 (2018-12-04)
Bugfix for zero-padding functionality
Added ndim for keras compatibility
0.8.1 (2018-12-03)
Bugfix in GenomicIndexer.create_from_region
0.8.0 (2018-12-02)
Improved test coverage
Improved linter issues
Bugs fixed
Improved documentation for scorers
Removed kwargs for scorers and exporters
Adapted exporters to classes
0.7.0 (2018-12-01)
First public version
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