lag.m: lag.m
In QuantAndrew/QUtility:

Description Usage Arguments Value Author(s) Examples

Methods for computing lags of matrix or vector objects.

1	lag.m(m, k = 1, na.pad = FALSE)

`m`	a matrix or a vector
`k`	the number of lags (in units of observations).Note the sign of k: a series lagged by a positive k is shifted earlier,and a negtive k is shifted later.
`na.pad`	logical. If TRUE it adds any rows that would not otherwise have been in the result with a value of NA. If FALSE those rows are dropped.

a matirx or a vector

Ruifei.yin

m <- matrix(1:10,5,2)
rownames(m) <- letters[1:5]
colnames(m) <- LETTERS[1:2]
lag.m(m,1)
lag.m(m,-1)
lag.m(m,1,TRUE)
v <- c(a=1,b=2,c=3,d=4)
lag.m(v,-2,TRUE)