Unlike SPM, SwE has no option to center covariates. If I recall, the motivation is that since SwE users are responsible for crafting the entire design, intercept included, default centering is ill-advised (in particular for the intercept(!)and 0/1 indicators). However, there's no reason the option couldn't be there with default "off".
See swe_run_smodel.m etc, comparing to SPM's config/spm_cfg_factorial_design.m
Unlike SPM, SwE has no option to center covariates. If I recall, the motivation is that since SwE users are responsible for crafting the entire design, intercept included, default centering is ill-advised (in particular for the intercept(!)and 0/1 indicators). However, there's no reason the option couldn't be there with default "off".
See
swe_run_smodel.metc, comparing to SPM'sconfig/spm_cfg_factorial_design.m