Example files are note included in the package

[Felixmil]

In the user manual, example files are loaded:

This will work on package dev environment but not on end-user computer (because test folder does not exist).

Instead, the example files should be located in the inst/extdata/ directory of the package so that they are made available to the user during package installation.

Then, the package should provide a utilitary function to easily access these files.

For example, if the example files are stored under inst/extdata/example we can add this in a example.R:

example_directory <- function() {
    dir(system.file("extdata", "example", package = "ospsuite.parameterIdentification"))
}

example_model <- function() {
    file.path(example_directory(), "Aciclvir.pkml")
}

This way, the vignettes could be updated to:

simulations <- c(loadSimulation(example_model())

This will work both during vignette generation and on user's computer.