time_at_events | R Documentation |
helpers for sfn_metrics
max_time(x, time) min_time(x, time)
x |
a numeric vector, usually a variable in the sapflow or environmental data. |
time |
a POSIXct or character vector with the TIMESTAMP values |
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.
a single value (POSIXct) with the TIMESTAMP value.
max_time()
: helper for sfn_metrics
min_time()
: helper for sfn_metrics
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))
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