# NOT RUN {
if (requireNamespace("xts", quietly = TRUE)) {
data(sample_matrix, package = "xts")
sample.xts <- xts::as.xts(sample_matrix) # xts might not be attached on search path
# print head of xts
print(head(sample.xts))
# print data.table
print(as.data.table(sample.xts))
}
# }
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