difference | R Documentation |
stable
difference(x, lag = 1, differences = 1, default = NA, order_by = NULL)
x |
Vector of values |
lag |
A positive integer indicating which lag to use. |
differences |
A positive integer indicating the order of the difference. |
default |
Value used for non-existent rows. Defaults to |
order_by |
Override the default ordering to use another vector or column |
A numeric vector of the same length as x
.
dplyr::lead and dplyr::lag
# examples from base difference(1:10, 2) difference(1:10, 2, 2) x <- cumsum(cumsum(1:10)) difference(x, lag = 2) difference(x, differences = 2) # Use order_by if data not already ordered (example from dplyr) library(dplyr, warn.conflicts = FALSE) tsbl <- tsibble(year = 2000:2005, value = (0:5)^2, index = year) scrambled <- tsbl %>% slice(sample(nrow(tsbl))) wrong <- mutate(scrambled, diff = difference(value)) arrange(wrong, year) right <- mutate(scrambled, diff = difference(value, order_by = year)) arrange(right, year)
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