我想知道如何将我的功能Bpp
设为 接受第一个参数的矢量 t
?
Bpp = function(t, n1, n2 = NULL){
N = ifelse(is.null(n2), n1, n1*n2/(n1+n2))
df = ifelse(is.null(n2), n1 - 1, n1 + n2 - 2)
H1 = integrate(function(delta)dcauchy(delta, 0, sqrt(2)/2)*dt(t, df, delta*sqrt(N)), -Inf, Inf)[[1]]
H0 = dt(t, df)
BF10 = H1/H0
p.value = 2*(1-pt(abs(t), df))
list(BF10 = BF10, p.value = p.value)
}
Bpp(t = -6:6, 20, 20) ## This will give error because `t` is now a vector?
答案 0 :(得分:2)
看起来我可以在没有测试的情况下给出快速回答。在Bpp
:
# joint density
joint <- function(delta, t) dcauchy(delta, 0, sqrt(2)/2) * dt(t, df, delta*sqrt(N))
# marginal density of `t`
marginal.t <- function (t) integrate(joint, lower = -Inf, upper = Inf, t = t)[[1]]
H1 <- sapply(t, marginal.t)
那么,在这里我们也可以使用
Vectorize
看起来怎么样?
使用原始Bpp
:
Bpp <- Vectorize(Bpp, vectorize.args = "t")
Bpp(-6:6, 20, 20)