Use Kable & Kable Styling to create the tables you need.
iris %>% head(15) %>% knitr::kable(., escape = F, row.names = F, format = "latex", booktabs= T) %>% kable_styling(full_width = FALSE, font_size = 10, latex_options = c("hold_position","repeat-header", "striped")) %>% #landscape() %>% column_spec(column = 1, width = "10em") %>% column_spec(column = 2, width = "10em") %>% column_spec(column = 3, width = "10em") %>% column_spec(column = 4, width = "10em")
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