我有一个鸟类位置数据集,我想每周取这些经/纬度值的平均值,并按鸟类和季节进行排序。
以下是数据示例:
datexample <- data.frame(
"site" = c("A","B"),
"bird" = c("1A","2A"),
"date" = c("2017-07-15", "2017-07-15", "2017-07-30", "2017-07-30"),
"season" = c("Fall","Winter"),
"lat" = c(45.25, 44.75, 44.75, 44.75),
"lon" = c(-61.75, -61.25, -61.75, -61.25)
)
datexample
这是我当前拥有的代码,它采用每只鸟的平均经/纬度,但未按季节对其进行排序。我尝试在函数中添加第二个“ type =”,但这不起作用。
library(openair)
datnew = timeAverage(datexample, avg.time = "week", statistic = "mean", type = "bird", interval = "season")
head(datnew)
我想每周按鸟类和季节来获得鸟类的平均位置。
我是R的新手,所以我们将不胜感激!