hello experts,

i am using EdgeR for my differential expression analysis. i want to define the contrast of interest but a bug appears with the following error message "unexpected input in "...…." i have gone through my command but i did not detect any typo or any error.

here is my command line

contrasts <- makeContrasts("30hpi" = group30hpi_infected – group30hpi_control, "90hpi" = group90hpi_infected – group90hpi_control,180hpi" = group180hpi_infected – group180hpi_control levels = design) Error: unexpected input in "contrasts <- makeContrasts("30hpi" = group30hpi_infected –"

please any help to solve this bug would be immensely appreciated

thanks all