Synthesizing Method for Fixed Values by Design in synthpop
Defines a synthesizing method for fixed values of a variable by design in the synthpop package.
syn.constant(y, x, xp, fixed_values, ...)
y |
Original data vector of length n |
x |
Matrix (n \times p) of original covariates |
xp |
Matrix (k \times p) of synthesised covariates |
fixed_values |
Vector containing fixed values |
... |
Further arguments to be passed |
When using the synthesis method "mice" in
synthpop::syn, the function argument has to appear
as rf.fixed_values (convention in synthpop).
A vector of length k with synthetic values of y.
## Not run:
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# EXAMPLE 1: SD2011 | Fixed values for variable sex
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library(synthpop)
#** selection of dataset
data(SD2011, package="synthpop")
vars <- c("sex","age","ls","smoke")
dat <- SD2011[1:1000, vars]
dat$ls <- as.numeric(dat$ls)
#** default synthesis
imp0 <- synthpop::syn(dat)
pred <- imp0$predictor.matrix
method <- imp0$method
#** constant vector
method["sex"] <- "constant"
fixed_values <- data.frame( sex=rep(dat$sex[c(1,2)], each=1000) )
imp <- synthpop::syn( dat, method=method, k=2000, m=1,
rf.fixed_values=fixed_values)
table(imp$syn$sex)
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