I use a function called mplusObject and rather than including a filename as an argument, I want to be able to run a loop with this code and let the filename be entered automatically by R (see VECTOR_1 towards the end of the code). This is a short and simplified version of the code:
mymodel <- mplusObject(
TITLE = "Some analysis;",
VARIABLE = "
usevariables = x1 x2 x3 c_age c_agesq;",
MODEL = "
att BY x1 x2 x3;
att ON c_age c_agesq;",
SAVEDATA = "
save = fscores;
file = VECTOR_1;",
rdata = selectedgroup)
The function mplusObject (in the package MplusAutomation) has several arguments, including one where it gives a filename for saving data generated by the model (towards the end of the code above). Instead of the filename, I have now written VECTOR_1.
I would like to define the content of VECTOR_1 (VECTOR_1 <- "filename")
outside the function. Coming from Stata, I thought this would be easy (by using something similar to what Stata calls local macros). But I don't succeed with R. How do I show R that VECTOR_1
is a vector and shouldn't be taken as the actual argument?
You can save your filepaths in a vector with
myvector <- c("filepath1", "filepath2", ...)
and loop over it with lapply
to save all your outputs in a list:
mymodels <- lapply(myvector, function(x) mplusObject(all other fixed arguments, file = x))
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