From: Estimating mutual information using B-spline functions – an improved similarity measure for analysing gene expression data
B i =1,k=2(x u )
B i =2,k=2(x u )
B i =3,k=2(x u )
x 1
1.0
0.0
x 2
0.6
0.4
x 3
0.2
0.8
x 4
x 5
x 6
p(a i )
1.8/6
2.4/6