Last data update: 2014.03.03
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R: Fit Ricker linear regression
fit_ricker | R Documentation |
Fit Ricker linear regression
Description
Fit a Ricker curve to spawner-recruit data and return the
intercept (a) and slope (b). The model is fit via the
RcppArmadillo package for speed..
Usage
fit_ricker(S, R)
Arguments
S |
Spawners as a numeric vector.
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R |
Recruits or returns as a numeric vector.
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Value
A named list with components a for the intercept and
b for the slope.
Examples
S <- seq(100, 1000, length.out = 100)
v_t <- rnorm(100, 0, 0.1)
R <- mapply(ricker_v_t, spawners = S, v_t = v_t, a = 1.9, b = 900, d = 1)
plot(S, log(R/S))
fit_ricker(S, R)
Results
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