Adding Error Bars to Facet Wrap Objects in ggplot2: A Solution Through Data Reshaping

Visualizing Multiple Response Variables with Stacked Bar Plots and Box Plots in R Using ggplot2

Understanding Scales in Facet Grid and Facet Wrap: A Key to Effective Faceting in ggplot2

Customizing Facet Wraps with ggplot2 for Consistent X-Axis Ticks