rstudio - Underline in RTF reporting in R -


hi want create following rtf data frame in r-

df <-  country         n1   mean1   sd1   n2   mean2    sd1  ---------------------------------------------------- bangladesh      52   25.03   0.02  43   22.31   0.08 germany         42   95.01   1.02  53   9.31    0.09 italy            2   20.22   0.00  11   8.09    1.11 ---

i want report as:

                    treatment         treatment b  country          n    mean    sd     n    mean     sd  ------------------------------------------------------ bangladesh      52   25.03   0.02    43   22.31   0.08 germany         42   95.01   1.02    53   9.31    0.09 italy            2   20.22   0.00    11   8.09    1.11 ---

with 2 underlines under texts "treatment a" , "treatment b". like-

        treatment ------------------------ n        mean         sd

can 1 please me.


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