Created
March 26, 2020 09:17
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Shell 1531
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# The shell math model is from the paper by M.B. Cortie (1989) | |
# https://www.researchgate.net/publication/238757952_Models_for_mollusc_shell_shape | |
# Load packages | |
library(mathart) # devtools::install_github("marcusvolz/mathart) | |
library(tidyverse) | |
# Set parameters (see mathart::mollusc() documentation for details) | |
n_s <- 650L | |
n_t <- 2000L | |
n <- 1000 | |
alpha <- 82.6 | |
beta <- 1.515 | |
phi <- 14.3 | |
mu <- 0 | |
Omega <- 0 | |
s_min <- -193.8 | |
s_max <- 69.4 | |
A <- 7.031 | |
a <- 2.377 | |
b <- 6.42 | |
P <- 0 | |
W_1 <- 1 | |
W_2 <- 1 | |
N <- 0 | |
L <- 0 | |
D <- 1 | |
theta_start <- 0 | |
theta_end <- 10*pi | |
# Generate data | |
df <- mollusc(n_s = n_s, n_t = n_t, | |
alpha = alpha, beta = beta, phi = phi, mu = mu, Omega = Omega, s_min = s_min, s_max = s_max, | |
A = A, a = a, b = b, P = P, W_1 = W_1, W_2 = W_2, N = N, L = L, D = D, | |
theta_start = theta_start, theta_end = theta_end) | |
# Create plot | |
p <- ggplot() + | |
geom_point(aes(x, z), df, size = 0.03, alpha = 0.03) + | |
geom_path(aes(x, z), df, size = 0.03, alpha = 0.03) + | |
coord_equal() + | |
theme_blankcanvas(margin_cm = 0) | |
# Save plot | |
ggsave("shell_1531.png", p, width = 40, height = 40, units = "cm") |
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