The tda package provides support for a few methods from topological data analysis.

Currently, methods for gridded data (images) are provided, including:

• Connected component labeling for binary images

• Object persistence analysis

• Landscape profiles

• Convex hull peels

See the examples directory for some use cases.

Below is a scatterplot of object birth/death times for this image, with 90%, 95%, and 99% convex hull peels plotted in red. See examples/persistence for the code used to produce this plot.

Below is a landscape plot based on the same image used above. See examples/landscape for the code used to produce this plot.

Below is an animated PNG showing part of the image above being thresholded at a sequence of values. See examples/animate_threshold for the code used to produce this plot.