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n.values <- c(500, 1000, 2000)
iterations <- 3

# Define the different parts of the file names
sizes <- c(500, 1000, 2000)
indices <- 1:3
folder <- "Data"

# Generate the file names dynamically
file_names <- paste0("dat_", rep(sizes, each = length(indices)), "_", rep(indices, times = length(sizes)))
file_paths <- file.path(folder, paste0(file_names, ".csv"))

# Read the files and assign them to a list
data_list <- setNames(lapply(file_paths, fread), file_names)

# Assign the list elements to variables in the global environment
list2env(data_list, envir = .GlobalEnv)