How to upload new Covariate data to an existing dataset?
The Upload Manager
allows the user to upload new private covariate data to an existing dataset. Click the Covariate
upload button in the Upload Manager
Then, select an existing species and dataset.
Finally, choose a covariate file in PLINK  format. Additional details about the Covariate file format can be found in the following FAQ
The status of the upload can be monitored in the Upload Manager
 Purcell S, Neale B, Todd-Brown K, Thomas L, Ferreira MAR,
Bender D, Maller J, Sklar P, de Bakker PIW, Daly MJ & Sham PC (2007)
PLINK: a toolset for whole-genome association and population-based
linkage analysis. American Journal of Human Genetics, 81.