Transformation from the Link Scale to the Observation Scale
The function transforms a variable from the link scale to the observation scale: probability or count.
invlink(x, type = c("cloglog", "log", "logit"))
x |
A vector of real numbers. |
type |
A character string. Legal values are “cloglog”, “log” and “logit”. |
anti-logit(x) = exp(x) / (1 + exp(x))
anti-cloglog(x) = 1 - exp(-exp(x))
x <- seq(-5, 5, length = 100) plot(x, invlink(x, type = "logit"), type = "l", lwd = 2, ylab = "Probability") lines(x, invlink(x, type = "cloglog"), lty = 2, lwd = 2) grid(col = "black") legend(-5, 1, legend = c("alogit(x)", "acloglog(x)"), lty = c(1, 2), bg = "white")
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