cascade()

Summarise multiple values into cascading groups 
group_by

Group a (survey) dataset by one or more variables. 
interact()

Create interaction terms to group by when summarizing 
summarise

Summarise multiple values to a single value. 
summarise_all

Manipulate multiple columns. 
survey_mean() survey_prop()

Calculate mean/proportion and its variation using survey methods 
survey_total()

Calculate the total and its variation using survey methods 
survey_quantile() survey_median()

Calculate the quantile and its variation using survey methods 
survey_ratio()

Calculate the ratio and its variation using survey methods 
survey_tally() survey_count()

Count/tally survey weighted observations by group 
survey_var() survey_sd()

Calculate the population variance and its variation using survey methods 
unweighted()

Calculate the an unweighted summary statistic from a survey 
survey_old_quantile() survey_old_median()

Calculate the quantile and its variation using survey methods 