ScalaLab and GroovyLab: Comparing Scala and Groovy for Scientific Computing

Algorithm 3

x   =  rand(50, 100)

row = 5; col = 2

xr = x[1..4+row, col..4col] // take a range

xrb = x[(1..20).by(2), (1..30).by(3)] // like, x(1:2:20, 1:3:30)

x[(1..40).by(5), 1..2]  = 44.