View source: R/formatting_funcs.R

center_interval | R Documentation |

After thickening all the values are either
shifted to the first or the last value of their interval.
This function creates a vector from `x`

, with the values shifted to
the (approximate) center of the interval. This can give a more accurate
picture of the aggregated data when plotting.

center_interval(x, shift = c("up", "down"), interval = NULL)

`x` |
A vector of class |

`shift` |
"up" or "down". |

`interval` |
The interval to be used for centering. If |

The interval will be translated to number of days when
`x`

is of class `Date`

, or number of seconds when `x`

is of
class `POSIXt`

. For months and quarters this will be the average
length of the interval. The translated units divided by two
will be added by or subtracted from each value of `x`

.

Vector of the same class as `x`

, with the values shifted to the
(approximate) center.

library(dplyr) library(ggplot2) plot_set <- emergency %>% thicken("hour", "h") %>% count(h) %>% head(24) ggplot(plot_set, aes(h, n)) + geom_col() plot_set %>% mutate(h_center = center_interval(h)) %>% ggplot(aes(h_center, n)) + geom_col()

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