\item{y}{The variable that will be used for Y axis in the heatmap. If not specified, the second column will be used.}
\item{value}{The variable that will be used for colouring the heatmap. If not specified, the third column will be used.}
\item{grouping}{The function that will be used to group if there is more than one observation for each X-Y combination. "mean" or "median" are posible, defaulting to "mean".}
\item{exclude_group}{If you want to exclude columns from grouping, you can introduce a character vector here. Useful if you want to facet the plot.}