tavolo.data.frame {catfun}

Create 2 x k frequency tables

Description

Helper function for creating 2 x k frequency tables.

Usage

## S3 method for class 'data.frame'
tavolo(df, x, y, weight = NULL, rev = c("neither",
  "rows", "columns", "both"), ...)

Arguments

df

a dataframe with binary variable y and categorical variable x.

x

categorical predictor/exposure, vector.

y

binary outcome, vector.

weight

an optional vector of count weights.

rev

character string indicating whether to switch row or column order, possible options are "neither", "rows", "columns", or "both". The default is "neither".

...

further arguments passed to or from other methods.

Value

tab

2 x k frequency table

Examples

trial <- data.frame(disease = c(rep("yes", 2), rep("no", 2)),
                    treatment = c(rep(c("estrogen", "placebo"), 2)),
                    count = c(751, 623, 7755, 7479))

tavolo(trial, treatment, disease, count)