expandData: Expand data over missing value This is particularly useful...
In sameermanek/mmisc: Miscellaneous functions and tools which I find useful

Expand data over missing value This is particularly useful for graphing (where you wnant NAs to indicate missing data) This can also be useful when calculating rolling means, etc

1	expandData(df, mxt.key.cols)

`df`	is a data.frame of data
`mxt.key.cols`	is a character vector that specifies the columns for which you want all combinations of OR mxt.key.cols is a named list, where the values of the list are additional levels to include

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df <- data.frame(a = 1:4, b = c('A','B','C','D'), c = runif(4), stringsAsFactors=FALSE)
expandData(df, c('a','b'))
expandData(df, list(a = c(1:10), b=LETTERS))