# diff

0th

Percentile

##### Lagged Differences

Returns suitably lagged and iterated differences.

Keywords
arith
##### Usage
diff(x, ...)
"diff"(x, lag = 1, differences = 1, ...)
"diff"(x, lag = 1, differences = 1, ...)
"diff"(x, lag = 1, differences = 1, ...)
##### Arguments
x
a numeric vector or matrix containing the values to be differenced.
lag
an integer indicating which lag to use.
differences
an integer indicating the order of the difference.
...
further arguments to be passed to or from methods.
##### Details

diff is a generic function with a default method and ones for classes "ts", "POSIXt" and "Date".

NA's propagate.

##### Value

If x is a vector of length n and differences = 1, then the computed result is equal to the successive differences x[(1+lag):n] - x[1:(n-lag)].If difference is larger than one this algorithm is applied recursively to x. Note that the returned value is a vector which is shorter than x.If x is a matrix then the difference operations are carried out on each column separately.

##### References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

diff.ts, diffinv.

• diff
• diff.default
• diff.POSIXt
• diff.Date
##### Examples
library(base) diff(1:10, 2) diff(1:10, 2, 2) x <- cumsum(cumsum(1:10)) diff(x, lag = 2) diff(x, differences = 2) diff(.leap.seconds) 
Documentation reproduced from package base, version 3.0.3, License: Part of R 3.0.3

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