Produce a Boxplot Annotated with the Number of Observations — boxplot2 • gplots

This funcntion uses boxplot to produce a boxplot which is then annotated with the number of observations in each group.

boxplot2(..., top=FALSE, shrink=1, textcolor=NULL)

Arguments

...: parameters passed to boxplot.
top: logical indicating whether the number of observations should be added to the top or the bottom of the plotting region. Defaults to FALSE.
shrink: value to shrink character size (cex) when annotating.
textcolor: text color.

Author

Gregory R. Warnes greg@warnes.net

Note

This function replaces boxplot.n, which has been deprecated avoid potential problems with S3 method dispatching.

See also

boxplot, text

Examples

data(state)

# n's at bottom
boxplot2( state.area ~ state.region)


# n's at top
boxplot2( state.area ~ state.region, top=TRUE)


# small red text
boxplot2( state.area ~ state.region, shrink=0.8, textcolor="red")