Ymir

Probabilistic models of immune receptors assembling

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Overview

Features

Paper

Details

Undetailed dependencies. For more information on dependencies see Installing and using Ymir subsection.

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Installing and using Ymir

You can use Ymir in two ways:

• using pre-made scripts for the most common tasks - computation of generation probabilities (sometimes I call them "assembling probabilities", estimation of parameters of an immune receptor assembling model from the experimental data or generation of pre-selection immune receptor sequences. For this tasks you need to compile some source code, but don't worry! It's very easy, just look at the next subsection. After compiling, take a look at the Examples / ready-to-use scripts section where pre-made scripts are explained in details.

• as an included library in your project.

Compiling Ymir

Note: you can see detailed installation of dependencies in next sections.

Dependencies:

• C++ compiler - either Clang or GCC. On benchmarks Clang is performing better then GCC.

• CMake - the build system which used in Ymir.

• Python 2 - the JsonCPP library which Ymir use need this version of Python.

• Python 3 - we need it for some useful scripts like converting input files to the Ymir's format and wrapping calls to Ymir C++ scripts.

• JsonCPP - JSON files used for storing metadata about models.

Installation on Ubuntu

Open your Terminal.

Install CMake and Pythons with

sudo apt-get install cmake
sudo apt-get install python
sudo apt-get install python3

Other installation steps (JsonCPP and compiling) are equal to those for Mac users.

Installation on Mac OS

Open your Terminal.

Install Homebrew by typing this into the Terminal:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

After that you need to install CMake and Pythons with the following commands:

brew install cmake
brew install python
brew install python3

At this point you can either install the JsonCPP library and download benchmark files by yourself (see next paragraphs) or simply go to Ymir's GitHub, download the latest release source code called Source_code_FULL.zip and unzip it. You will see the new folder called ymir. In both ways to compile Ymir you need to make your Terminal point to Ymir's folder.

To install JsonCPP you should clone the repository and install JsonCPP library by the following commands:

git clone https://github.com/imminfo/ymir.git
cd ymir
curl -sL https://github.com/open-source-parsers/jsoncpp/archive/master.zip > jsoncpp.zip
unzip jsoncpp.zip
rm jsoncpp.zip
cd jsoncpp-master
python amalgamate.py
mv ./dist/jsoncpp.cpp ../Ymir/src/jsoncpp.cpp
mv ./dist/json ../include/json
cd ..

And now, finally when you are in Ymir's folder, you can compile Ymir:

mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
cmake --build . && cd ..

It will build a number of Ymir programs to run: tests, benchmarks and ready-to-use scripts.

You can test Ymir with running

python3 ytest.py

For benchmarks you need to download benchmark files (if you haven't download Source_code_FULL.zip):

curl -sL https://github.com/imminfo/ymir/releases/download/v2.0-bench/benchmark-alpha-full.tgz > benchmark-alpha-full.tgz
curl -sL https://github.com/imminfo/ymir/releases/download/v2.0-bench/benchmark-beta-full.tgz > benchmark-beta-full.tgz
gunzip benchmark-alpha-full.tgz
gunzip benchmark-beta-full.tgz
mv benchmark-alpha-full/* ./benchmark/data/
mv benchmark-beta-full/* ./benchmark/data/
rm -r benchmark-alpha-full
rm -r benchmark-beta-full

To run benchmarks execute

python3 ybenchmark.py

To see how you can use pre-made scripts go to the Examples / ready-to-use scripts section.

Using Ymir as a library

Ymir is a header only library, however, you need to put the jsoncpp.cpp file to the Ymir/src folder.

In your CMakeLists.txt files you should put include_directories(include) if Ymir's folder is in the include directory.

Next text is assumed that your include path is setted to $YMIR_FOLDER/.

For using only the core data structures MAAG and MAAGBuilder add:

#include <Ymir/Graph>

For computing and generation assembling probabilities from files:

#include <Ymir/Model>

For the statistical inference of marginal parameters of generation models:

#include <Ymir/Inference>

For super secret unimplemented things:

#include <Ymir/Pattern>

Wow-wow, easy here. They are not implemented yet.

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Main helper script

python3 pyymir.py

• python3 pyymir.py -v - print the current version of Ymir.
• python3 pyymir.py -a - list all available algorithms for the statistical inference of marginal probabilities and their aliases.
• python3 pyymir.py -m - list all available models and their aliases.
• python3 pyymir.py -f - list all available converters for input formats and their aliases.
• python3 pyymir.py -s - list all available pre-made scripts.

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Examples / ready-to-use scripts

After compiling an executable files will appear in the build folder.

You can download sample files with outputs from tcR package and MiTCR software with

curl -sL https://github.com/imminfo/ymir/releases/download/v1.0-pre3/example-files.zip > examples.zip 
unzip examples.zip 

Compute generation probabilities of human TCR-alpha data from tcR output files

The most common task with generation probabilities is to compute them.

python3 compute.py -i <INPUT> -f <FORMAT> -m <MODEL> [-o <OUTPUT>] [-p] [-l]

Note: run python3 compute.py -h to see a help message.

• <INPUT> - input file (text or gzipped) or a folder with input files (of the same format) or a list of space-separated files and/or folders in any combinations.
• <FORMAT> - format of input files (tcR, MiTCR, MiGEC, etc.) as an alias or as a Python 3 class from your module linked to the '$YMIR_HOME/converters' package. For a list of possible input formats and their aliases in this Ymir distribution run $python3 pyymir.py -f.
• <MODEL> - either an alias of the one from available models in Ymir or a path to a folder with a model's .json file. For a list of available models in this Ymir distribution run $python3 pyymir.py -m.
• <OUTPUT> - optional path to the output folder for output files (default is ./ymir_genprob/).
• -p - recompute or use predefined model's gene usage (default is to recompute, to change it add -p to your script call).
• -l - add this to leave converted files (default is to remove converted files).

Example command to compute generation probabilities from tcR file:

python3 compute.py -i ./examples/tcr.htra.txt -f tcr -m htra

Estimate human TCR-beta generation model parameters using EM-algorithm from MiTCR output files

python3 inference.py -i ??? -f mitcr -m htrb

Note: run python3 inference.py -h to see a help message.

Example command to perform statistical inference from MiTCR file:

python3 inference.py -i ./examples/mitcr.htrb.txt -f mitcr -m htrb

Run python3 pyymir.py -m to view all available models and their aliases.

Generate artificial human TCR-alpha repertoire before selection

python3 generate.py -c 500000 -m htra

Note: run python3 generate.py -h to see a help message.

asdasd

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Types of input files and their formats

Model files

Main JSON file

Gene segments files

Event probability files

Cloneset files

Available parsers

Reminder: run python3 pyymir.py -f to view all available formats and their aliases.

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Benchmarks

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