Could anyone explain What is trim argument in mean

Question

x <- c(0:2, 50)
mean(x,0.9)
#[1] 1.5
mean(x)
#[1] 13.25
mean(x,0.10)
#[1] 13.25
mean(x,0.50)
#[1] 1.5
mean(x,0.4)
#[1] 1.5
mean(x,0.3)
#[1] 1.5
mean(x,0.2)
#[1] 13.25

Could anyone explain in detail how trim argument work in R functions

Answer 1

'trim'指定从数据的两侧删除的元素的分数...删除这些元素后，计算平均值...此处元素的数量为4，如果我们删除0.1的4的分数，则意味着我们要删除0.1 * 4的数组....此数字小于1，因此我们不会删除任何项目...当我们将'trim'分配给0.5时，这意味着我们将删除0.5 * 4的数据，此函数将计算出剩余元素的平均值

Answer 2

"Values of trim outside that range are taken as the nearest endpoint."

I think it might be performing winsorization to the values which fall outside the trim boundary. Then using those winsored values plus the regular values which were inside the trim boundry.