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How to represent NA in rJava

I have a scala program that produces some time series data to be used in R. The data values are Doubles with some missing values but I don't know how I should represent these NA values in my scala program?

Solution

  • Use org.rosuda.REngine.REXPDouble.NA to indicate to R that there is missing data. It is a type of Double.NaN, but different than the one that Java normally uses (so you have to specify it). You can use org.rosuda.REngine.REXPDouble.isNA to verify whether a NaN is R's missing-data NaN or an ordinary one.

    For what it's worth, the value presently seems to be 0x7ff00000000007a2L, which you can put into a double yourself like so: java.lang.Double.longBitsToDouble(0x7ff00000000007a2L). Probably safer to just use REXPDouble.NA, though.