UNITE features extracted from sWGS data

For best practices in reproducible science, all features used in the paper, i.e., Len, SD, C/T, S/L, CNA and multidimension arrays, as well as metadata of all samples are stored in an `MultiAssayExperiment` object in RDS format. The RDS files are depostied in this Zenodo record.

The features from cross validation, held-out test and unseen test are saved in three R object, respectively. 

`MultiAssayExperiment` offers a data structure for representing and analyzing multi-omics experiments.

To extract those features from the `MultiAssayExperiment` object, please refer to [documentation](https://www.bioconductor.org/packages/release/bioc/vignettes/MultiAssayExperiment/inst/doc/MultiAssayExperiment.html).

For more details on UNITE pipeline, please see GitHub page: https://github.com/nrlab-CRUK/UNITE-paper