Interfacing with R
R provides a datasets package that contains sample datasets. The morley dataset has data from measurements of the speed of light made in 1879. The speed of light is a fundamental physical constant and its value is currently known very precisely. The data is described at http://stat.ethz.ch/R-manual/R-devel/library/datasets/html/morley.html. The speed of light value can be found in the scipy.constants module. The R data is stored in an R DataFrame with three columns:
- The experiment number, from one to five
- The run number, with twenty runs per experiment, bringing the total number of measurements to 100
- The measured speed of light in kilometers per second with 299,000 subtracted
The rpy2.robjects.r() function executes R code in a Python environment. Load the data as follows:
pandas2ri.activate()
r.data('morley')
The Pandas library's R interface via the pandas.rpy.common module is deprecated, and thus it is suggested that the reader uses rpy2 objects module....
