Changes in version 1.21.1 o update maintainer email address Changes in version 1.11.5 o return beta and gamma as matrix Changes in version 1.11.4 o update vignette with SC RNA sequencing data Changes in version 1.11.2 o re-upload files under Version 1.11.1 Changes in version 1.11.1 o update reference manual with single-cell RNA sequencing data Changes in version 1.9.2 o update description for single-cell data in reference manual. Changes in version 1.9.1 o add example for single-cell data. Changes in version 1.7.1 o add reference. Changes in version 1.1.2 o update NEWS file. Changes in version 1.1.1 o allow adjustment of covariates; o update 'SDA' with additional arguments passed to 'qvalue'. Changes in version 0.99.7 o package submission.