snpgdsCombineGeno makes new snp.id when combine multiple gds files

[yangli-ai]

I have several gds files. Their snp.id are numeric but not continuous. Gds file 1 has snp.id like 1, 2, 3, ...,10; Gds file 2 has 20, 21, ...., 30. (Our original gds files don't use rsID for each SNP)
After I used snpgdsCombineGeno, the new gds file changed snp.id to make it continous, like 1,2,3,...10,11,...20. I cannot keep the original snp.id.

[zhengxwen]

You can use the functions in the gdsfmt package to change snp.id in the new GDS file:

add.gdsn(f, "snp.id", your_new_snp_id, replace=TRUE)

[yangli-ai]

Will snpgdsCombineGeno change the order of these SNPs from multiple gds files? I cannot check it, as SNP IDs have been changed.