calc_gap {circlize}  R Documentation 
Calculate gaps to make two Chord diagrams in the same scale
calc_gap(x1, x2, big.gap = 10, small.gap = 1)
x1 
The matrix or the data frame for the first Chord diagram. 
x2 
The matrix or the data frame for the second Chord diagram. 
big.gap 

small.gap 

Both Chord diagrams should be both twogroup Chord diagram.
A numeric value which can be directly set to big.gap
in the second Chord diagram.
set.seed(123)
mat1 = matrix(sample(20, 25, replace = TRUE), 5)
chordDiagram(mat1, directional = 1, grid.col = rep(1:5, 2), transparency = 0.5,
big.gap = 10, small.gap = 1)
mat2 = mat1 / 2
gap = calc_gap(mat1, mat2, big.gap = 10, small.gap = 1)
chordDiagram(mat2, directional = 1, grid.col = rep(1:5, 2), transparency = 0.5,
big.gap = gap, small.gap = 1)