Cleans absent levels in sample_data/data.frame.
This is used internally by the builder method, sample_data, to
ensure that the factors describing categorical variables in a data.frame or
sample_data object are free of extra levels that can plague downstream plots
analysis.
reconcile_categories(DFSM)
DFSM |
(Required). A |
A single data.frame object. Even if the input argument is a sample_data,
the return is a data.frame. Because this is intended to be used internally by
the builder method, it cannot also call the builder function to re-build
the cleaned sample_data.
# # # data(GlobalPatterns) # # # SM <- sample_data(GlobalPatterns) # # # DF <- data.frame(SM) # # # DF <- data.frame(DF, col1=1:nrow(DF), col2=paste(1:nrow(DF), "t", sep="")) # # # DF <- reconcile_categories(DF) # # # SM <- sample_data(reconcile_categories(SM)) # # # sapply(DF, class) # # # sapply(SM, class)
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