scicom | Scientific Computing for JRuby

require ‘scicom’
# This dataset comes from Baseball-Reference.com.
baseball = R.read__csv("baseball.csv")
# Lets look at the data available for Momeyball.
moneyball = baseball.subset(baseball.Year < 2002)

# Let's see if we can predict the number   

# Basic integration with R can always be done by calling eval and passing it a valid
# R expression.
> R.eval("r.i = 10L")
> R.eval("print(r.i)")

[1] 10

> R.eval("vec = c(10, 20, 30, 40, 50)")
> R.eval("print(vec)")

[1] 10 20 30 40 50
  

> vec = R.c(2.4, 5.55, 10, 18.27, 34.45)
> vec.pp

[1]   2,4  5,55    10 18,27 34,45

> vec2 = R.c(vec, 3.5)
> vec2.pp

[1]   2,4  5,55    10 18,27 34,45   3,5

> dbl = 3.5
> vec3 = R.c(vec2, dbl)
> vec3.pp

[1]   2,4  5,55    10