README.md

# Integrative Network Fusion (INF)
![INF pipeline ](figs/INF_pipeline.jpeg)

Repository attached to the article "Integrative Network Fusion: a multi-omics approach in molecular profiling".

**Authors**: Marco Cherici*, Nicole Bussola*, Alessia Marcolini*, Margherita Francescatto, Alessandro Zandonà, Lucia Trastulla, Claudio Agostinelli, Giuseppe Jurman, Cesare Furlanello.

## Setup
```bash
git clone https://gitlab.fbk.eu/MPBA/INF
cd INF
conda env create -f env.yml -n inf
conda activate inf
```

### Additional dependencies

#### R dependencies
To install the R dependencies (not in conda channels), run the following command via the R prompt:
```bash
install.packages("TunePareto")
```

#### MLPY

The `mlpy` package is required for some operations included in the DAP procedure. The version available on PyPI is outdated and not working on OSX platforms.

To install `mlpy` these are the steps to follow:

Let `<ANACONDA>` be your anaconda path (e.g., `/home/user/anaconda3`).

Adjust these environmental variables:
```bash
export LD_LIBRARY_PATH=<ANACONDA>/envs/<ENV>/lib:${LD_LIBRARY_PATH}
export CPATH=<ANACONDA>/envs/<ENV>/include:${CPATH}
```

and then install `mlpy` from GitLab:
```bash
pip install git+https://gitlab.fbk.eu/MPBA/mlpy.git
```

## Data availability
All the data used to perform the experiments has been published on [Figshare](dx.doi.org/10.6084/m9.figshare.12052995.v1), both raw data (`original.tar.gz`) and preprocessed data (`tcga_aml.tar.gz`, `tcga_brca.tar.gz`, `tcga_kirc.tar.gz`).


## Usage

#### Quick start

To quickly reproduce our results, first download preprocessed data from [Figshare](dx.doi.org/10.6084/m9.figshare.12052995.v1). Follow instructions in the Setup section and then in a shell:

```bash
for filename in *.tar.gz; do; tar zxfv $filename; done
mkdir data
mv tcga* data
./runner.sh
``` 

#### Data splits generation

To recreate the 10 data splits, first run the following commands in a shell:

```bash
Rscript scripts/prepare_ACGT.R --tumor aml --suffix 03 --datadir data/original/Shamir_lab --outdir data/tcga_aml
Rscript scripts/prepare_ACGT.R --tumor kidney --suffix 01 --datadir data/original/Shamir_lab --outdir data/tcga_kirc
Rscript scripts/prepare_BRCA.R --task ER --datadir data/original --outdir data/tcga_brca
Rscript scripts/prepare_BRCA.R --task subtypes --datadir data/original --outdir data/tcga_brca
```

This creates 10 TR/TS partitions, with ID 0 to 9. To further partition into the 10 TR/TS/TS2 splits described in the paper, with ID 50 to 59 (you can use any other IDs), run in a shell:

```bash
for dataset in tcga_aml tcga_kirc; do
    python resplitter.py --datafolder data --dataset=$dataset --target OS --n_splits_start 0 --n_splits_end 10 --split_offset 50
done

for target in ER subtypes; do
    python resplitter.py --datafolder data --dataset=tcga_breast --target $target --n_splits_start 0 --n_splits_end 10 --split_offset 50
done
```

#### Input files

* Omics layer files: samples x features, tab-separated, with row & column names
* Labels file: one column, just the labels, no header (**same order as the data files**)

#### Example run

The INF pipeline is implemented with a [Snakefile](https://snakemake.readthedocs.io/en/stable/index.html).

The following directory tree is required:

* `{datafolder}/{dataset}/{target}/{split_id}/{layer}_{tr,ts,ts2}.txt`
* `{datafolder}/{dataset}/{split_id}/labels_{target}_{tr,ts,ts2}.txt`
* `{outfolder}/{dataset}/{target}/{model}/{split_id}/{juxt,rSNF,rSNFi,single}` _(these will be created if not present)_

All the {variables} can be specified either in a config.yaml file or on the command line. 

Example:

```bash
snakemake --config datafolder=data outfolder=results dataset=tcga_brca target=ER \
    layer1=gene layer2=cnv layer3=prot model=randomForest random=false split_id=0 -p 
```

This example showed an example pipeline using three omics layers from BRCA-ER dataset. You can use an arbitrary number of omics layers by adding or removing `layer` arguments accordingly.

A maximum number of cores can also be set (default is 1):

```bash
snakemake [--config etc.] --cores 12
```

The pipeline can be "dry-run" using the `-n` flag:

```bash
snakemake --cores 12 -n
```

*A bash script (`runner.sh`) is provided for convenience, in order to run the pipeline for each split, to compute Borda of Bordas and to average metrics for all the splits.*