python3.Rmd

---

title: python3 test

---

# this setup code is important, otherwise it won't run!
library(reticulate)
use_python('/usr/bin/python3')

# alternatively, you can use this to set an engine executable
#knitr::opts_chunk$set(engine.path = list(
#  python = '/usr/bin/python3'
#))

Hi, I'm Python

x = 12 + 23**5
print(x)

Running

import sys
print(sys.version)

Plotting

import numpy as np
import matplotlib.pyplot as plt
xx = np.linspace(0, 10, 100)
yy = np.sin(xx)
plt.plot(xx, yy)
plt.show()

R still works, too

x <- c(1,2,3,2,1)
plot(x)

Interactions between R and Python

This uses the reticulate R library:

Retrieve the value of x from the Python session again:

py$x

Assign to a variable in the Python session from R:

py$y = 1:5

See the value of y in the Python session:

print(y)