parser.add_argument("--ld-type",help="Ld can be supplied as plink command --ld-snp-list output files (see raiss.ld_matrix.launch_plink_ld to compute these data using plink) or as a couple of a scipy sparse matrix (.npz )and an .csv containing SNPs index",default="plink")
parser.add_argument('--ref-panel-prefix',help="prefix for the reference panel files",default="")
parser.add_argument('--ref-panel-suffix',help="suffix for the reference panel files",default=".bim")
parser.add_argument('--minimum-ld',help="this parameter ensure that their is enough typed SNPs around the imputed to perform a high accuracy imputation",default=4)
parser.add_argument('--minimum-ld',help="this parameter ensure that their is enough typed SNPs around the imputed loci to perform a high accuracy imputation",default=4)