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 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:
ro.r('data(morley)')The pandas library provides an R interface via the pandas.rpy.common module. Load the data into a pandas DataFrame as follows:
df = com.load_data('morley')Let's group the data by experiment with the...