I have two vectors. In v1 growth begins quickly and then slows down. In v2 growth begins slowly but then quickly accelerates
v1 <- c(1,25,39,49,59,58,66,69,76,78,82,86,87,87,88,86)
v2 <- c(1,2,1,3,2,2,4,3,5,14,29,45,68,90,140,200)
I'm trying to make both vectors look more linear
log does a decent job on v2
plot(log(v2))
but how should I transform v1? exp does a terrible job
plot(exp(v1))
Is there a generic R function I can use for growth rates such as v1?