RPy2 can only be used to call R from Python, and not the other way around. We will import some sample R datasets and plot the data of one of them.
The complete code for this recipe is in the rdatasets.py file in this book's code bundle:
from rpy2.robjects.packages import importr
import numpy as np
import matplotlib.pyplot as plt
datasets = importr('datasets')
mtcars = datasets.__rdata__.fetch('mtcars')['mtcars']
plt.title('R mtcars dataset')
plt.xlabel('wt')
plt.ylabel('mpg')
plt.plot(mtcars)
plt.grid(True)
plt.show()The motorcars dataset is described at https://stat.ethz.ch/R-manual/R-devel/library/datasets/html/mtcars.html. Let's start by loading this sample R dataset:
Load a dataset into an array with the RPy2
importr()function. This function can importRpackages. In this example, we will import the datasets R package. Create a NumPy array from themtcarsdataset:datasets = importr('datasets...