x <- 1:10
expect_equal(returns(x),
returns(x, lag = 1))
expect_equal(returns(x, lag = 2),
x[3:10]/x[1:8] - 1)
library("zoo")
t <- as.Date("2000-1-1")+1:10
expect_equal(returns(x, t, lag = 2), ## 't' is ignored
returns(x, lag = 2))
expect_equivalent(unclass(returns(zoo(x, t), lag = 2)),
returns(x, lag = 2))
expect_equal(index(returns(zoo(x, t), lag = 2)), t[-c(1:2)])
expect_equal(index(returns(zoo(x, t), lag = 2, pad = NA)), t)
expect_true(all(is.na(
coredata(returns(zoo(x, t), lag = 2, pad = NA))[1:2])))
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