cm.matrix {CreditMetrics} | R Documentation |
cm.matrix
tests if the given matrix M
is a migration matrix. This
is the dimensions of the migration matrix should be at least 2 times 2 and the
row and column dimension must be equal. Further the values in the migration
matrix should be between 0 and 1. And the sum of each row should be 1.
cm.matrix(M)
M |
one year empirical migration matrix, where the last row gives the default class. |
There is no return value if the given migration matrix M
fullfills the
above attributes.
Andreas Wittmann andreas_wittmann@gmx.de
Glasserman, Paul, Monte Carlo Methods in Financial Engineering, Springer 2004
# one year empirical migration matrix form standard&poors website rc <- c("AAA", "AA", "A", "BBB", "BB", "B", "CCC", "D") M <- matrix(c(90.81, 8.33, 0.68, 0.06, 0.08, 0.02, 0.01, 0.01, 0.70, 90.65, 7.79, 0.64, 0.06, 0.13, 0.02, 0.01, 0.09, 2.27, 91.05, 5.52, 0.74, 0.26, 0.01, 0.06, 0.02, 0.33, 5.95, 85.93, 5.30, 1.17, 1.12, 0.18, 0.03, 0.14, 0.67, 7.73, 80.53, 8.84, 1.00, 1.06, 0.01, 0.11, 0.24, 0.43, 6.48, 83.46, 4.07, 5.20, 0.21, 0, 0.22, 1.30, 2.38, 11.24, 64.86, 19.79, 0, 0, 0, 0, 0, 0, 0, 100 )/100, 8, 8, dimnames = list(rc, rc), byrow = TRUE) cm.matrix(M)