MADMMplasso readme examples with `parallel = TRUE`

readme-code-parallel.R

# Install and load the package, set the seed
remotes::install_github("ocbe-uio/MADMMplasso")
library(MADMMplasso)
set.seed(1235)

# Generate the data
N <- 100
p <- 50
nz <- 4
K <- nz
X <- matrix(rnorm(n = N * p), nrow = N, ncol = p)
mx <- colMeans(X)
sx <- sqrt(apply(X, 2, var))
X <- scale(X, mx, sx)
X <- matrix(as.numeric(X), N, p)
Z <- matrix(rnorm(N * nz), N, nz)
mz <- colMeans(Z)
sz <- sqrt(apply(Z, 2, var))
Z <- scale(Z, mz, sz)
beta_1 <- rep(x = 0, times = p)
beta_2 <- rep(x = 0, times = p)
beta_3 <- rep(x = 0, times = p)
beta_4 <- rep(x = 0, times = p)
beta_5 <- rep(x = 0, times = p)
beta_6 <- rep(x = 0, times = p)

beta_1[1:5] <- c(2, 2, 2, 2, 2)
beta_2[1:5] <- c(2, 2, 2, 2, 2)
beta_3[6:10] <- c(2, 2, 2, -2, -2)
beta_4[6:10] <- c(2, 2, 2, -2, -2)
beta_5[11:15] <- c(-2, -2, -2, -2, -2)
beta_6[11:15] <- c(-2, -2, -2, -2, -2)

Beta <- cbind(beta_1, beta_2, beta_3, beta_4, beta_5, beta_6)

colnames(Beta) <- c(1:6)

theta <- array(0, c(p, K, 6))
theta[1, 1, 1] <- 2
theta[3, 2, 1] <- 2
theta[4, 3, 1] <- -2
theta[5, 4, 1] <- -2
theta[1, 1, 2] <- 2
theta[3, 2, 2] <- 2
theta[4, 3, 2] <- -2
theta[5, 4, 2] <- -2
theta[6, 1, 3] <- 2
theta[8, 2, 3] <- 2
theta[9, 3, 3] <- -2
theta[10, 4, 3] <- -2
theta[6, 1, 4] <- 2
theta[8, 2, 4] <- 2
theta[9, 3, 4] <- -2
theta[10, 4, 4] <- -2
theta[11, 1, 5] <- 2
theta[13, 2, 5] <- 2
theta[14, 3, 5] <- -2
theta[15, 4, 5] <- -2
theta[11, 1, 6] <- 2
theta[13, 2, 6] <- 2
theta[14, 3, 6] <- -2
theta[15, 4, 6] <- -2

library(MASS)
pliable <- matrix(0, N, 6)
for (e in 1:6) {
  pliable[, e] <- compute_pliable(X, Z, theta[, , e])
}
esd <- diag(6)
e <- MASS::mvrnorm(N, mu = rep(0, 6), Sigma = esd)
y_train <- X %*% Beta + pliable + e
y <- y_train
colnames(y) <- c(paste("y", 1:(ncol(y)), sep = ""))
TT <- tree_parms(y)

gg1 <- matrix(0, 2, 2)
gg1[1, ] <- c(0.02, 0.02)
gg1[2, ] <- c(0.2, 0.2)
nlambda <- 50
e.abs <- 1E-4
e.rel <- 1E-2
alpha <- .5
tol <- 1E-3

# Fitting models
message("fit_C")
fit_C <- MADMMplasso(
  X, Z, y,
  alpha = alpha, my_lambda = NULL,
  lambda_min = 0.001, max_it = 5000, e.abs = e.abs, e.rel = e.rel, maxgrid = nlambda,
  nlambda = nlambda, rho = 5, tree = TT, my_print = FALSE, alph = 1,
  pal = FALSE, gg = gg1, tol = tol, legacy = FALSE, cl = 3L
)

message("fit_R")
fit_R <- MADMMplasso(
  X, Z, y,
  alpha = alpha, my_lambda = NULL,
  lambda_min = 0.001, max_it = 5000, e.abs = e.abs, e.rel = e.rel, maxgrid = nlambda,
  nlambda = nlambda, rho = 5, tree = TT, my_print = FALSE, alph = 1,
  pal = FALSE, gg = gg1, tol = tol, legacy = TRUE, cl = 3L
)

Thanks for the report, Theo! This issue has been also reported on ocbe-uio/MADMMplasso#53, I'll take a look at it ASAP.

Alright, Waldir. Thank you.