time_at_events {sapfluxnetr} | R Documentation |
time at maximum/minimum
Description
helpers for sfn_metrics
Usage
max_time(x, time)
min_time(x, time)
Arguments
x |
a numeric vector, usually a variable in the sapflow or environmental data. |
time |
a POSIXct or character vector with the TIMESTAMP values |
Details
These helper functions return the TIMESTAMP value at which the maximum value for other variable occurs. It is designed to be used inside a dplyr summarise statement.
Value
a single value (POSIXct) with the TIMESTAMP value.
Functions
-
max_time()
: helper for sfn_metrics -
min_time()
: helper for sfn_metrics
Examples
library(dplyr)
storms %>%
group_by(year) %>%
summarise(wind_max = max(wind),
hour_at_max = sapfluxnetr:::max_time(wind, time = hour),
wind_min = min(wind),
hour_at_min = sapfluxnetr:::min_time(wind, time = hour))
[Package sapfluxnetr version 0.1.4 Index]