问题描述
我是R studio的新手。我正在尝试为此数据拟合S形曲线
x <- c(0,0.19,0.3,0.4,0.52,0.65,0.78,0.9,1,1.5,2,3)
y <- c(0,0.001131392946767,0.001429213070191,0.001695405556196,0.008619063174144,0.00970100252551,0.014973553352495,0.022978522580874,0.038357458205673,0.045039437163441,0.052570608708667,0.050651474312204)
即使在网上阅读了很多书之后,我仍然不知道如何设置配件。
fit <- nls(y~max(y)*x^n/k^n+x^n,start=list(n=4,k=1))
当我进行拟合时,它给了我一个奇异的梯度误差。有人可以帮忙吗? :(