Plotting Two Continuous Variables

In this chapter, we will cover the following recipes:

• Plotting a basic scatterplot
• Hacking ggvis add_axis() function to operate as a title function
• Plotting a scatterplot with shapes and colors
• Plotting a shape reference palette for ggplot2
• Dealing with over-plotting, reducing points
• Dealing with over-plotting, jittering points
• Dealing with over-plotting, alpha blending
• Rug the margins using geom_rug()
• Adding marginal histograms using ggExtra
• Drawing marginal histogram using gridExtra
• Crafting marginal plots with plotly
• Adding regression lines
• Adding quantile regression lines
• Drawing publish-quality scatterplots