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Thank you very much

Thank you very much for share.
But i cann’t work on
as library(dummies)
combi <-, names=c(‘Outlet_Size’,‘Outlet_Location_Type’,‘Outlet_Type’, ‘Item_Type_New’), sep=’_’)
it show error when i load the above code.
Error: Can’t use matrix or array for column indexing
Call rlang::last_error() to see a backtrace

Muchas Gracias, excelente apoyo a los principiantes… desde Venezuela saludois