Data Science Desktop Survival Guide
by Graham Williams
Scatter Plot Smooth Gam
ggplot(aes(x=date, y=max_temp)) +
geom_smooth(method="gam", formula=y~s(x, bs="cs")) +
This scatter plot of x=date against y=max_temp shows a pattern of seasonality over the dataset and a trend line over the period of the dataset.
The scatter plot is again created using ggplot2::geom_point().
Typical of scatter plots of big data there will be many overlaid
points. To reduce the impact the points are reduced to a small dot
An additional layer of a smooth fitted curve, using ggplot2::geom_smooth(), is added. The dataset has many points and so a smoothing method recommended is method="gam" which will automatically be chosen if not specified but with a message to that effect. The formula specified using formula= is also the default for method="gam".