rand_walk_helper | R Documentation |
A function to help build random walks by mutating a data frame.
rand_walk_helper(.data, .value)
.data |
The data frame to mutate. |
.value |
The .initial_value to use. This is passed from the random walk function being called by the end user. |
A function to help build random walks by mutating a data frame. This mutation
adds the following columns to the data frame: cum_sum
, cum_prod
, cum_min
,
cum_max
, and cum_mean
. The function is used internally by certain functions
that generate random walks.
A modified data frame/tibble with the following columns added:
cum_sum
: Cumulative sum of y
.
cum_prod
: Cumulative product of y
.
cum_min
: Cumulative minimum of y
.
cum_max
: Cumulative maximum of y
.
cum_mean
: Cumulative mean of y
.
Steven P. Sanderson II, MPH
Other Utility Functions:
convert_snake_to_title_case()
,
generate_caption()
,
get_attributes()
,
running_quantile()
,
std_cum_max_augment()
,
std_cum_mean_augment()
,
std_cum_min_augment()
,
std_cum_prod_augment()
,
std_cum_sum_augment()
df <- data.frame(
walk_number = factor(rep(1L:25L, each = 30L)),
x = rep(1L:30L, 25L),
y = rnorm(750L, 0L, 1L)
)
rand_walk_helper(df, 100)
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