How to check the imputation quality of genotyping files?

Question

[xqyjxau]

Dear talents,

Hi,

I recently started a GWAS project with genotyping files (Oncoarray and iCOGS if you have heard) which has been imputed by previous colleague who has left. I have the imputation code from him.

In addition to examine the imputation code, how can I have a fast check of the quality of imputed genotyping files themseleves?

Thank you very much.

[curious]

how was it imputed, usually the softwares give an estimated imputation quality metric for each variant in the output