问题
I'm currently working on a script which should analyze a dataset based on a 'configuration' file.
The input of this file is for instance:
configuration.txt:
123456, 654321
409,255,265
1
It can contain onther values as well, but they will al be numeric. In the example described above the file should be read in as follows:
timestart <- 123456
timeend <- 654321
exclude <- c(409,255,265)
paid <- 1
The layout of the configuration file is not fixed, but it should contain a starting time (unix) an ending time (unix) an array with numbers to exclude and other fields. In the end it should be constructed from fields a user specifies in a GUI. I don't know which formatting would suit best for that case, but as soon as I have these basics working I don't think that will be a big problem.
But that will make it harder to know which values belong to which variable.
回答1:
Indeed, as Andrie suggested, using a .r config file is the easiest way to do it. I overlooked that option completely!
Thus, just make a .r file with the variables already in it:
#file:config.R
timestart <- 123456
timeend <- 654321
exclude <- c(409,255,265)
paid <- 1
In other script use:
source("config.R")
And voila. Thank you Andrie!
回答2:
Another alternative would be to use the config package. This allows setting configuration values to be executed according to the running environment (production, test, etc.). All parameters are accessed by a list and are loaded by a YAML text format configuration file.
More details and examples about config can be found here: https://cran.r-project.org/web/packages/config/vignettes/introduction.html
If you wants to load a JSON, TOML, YAML, or INI text configuration file, see also the configr package.
来源：https://stackoverflow.com/questions/11051187/reading-and-using-a-custom-configuration-file