[R] Replacing 9999 and 999 values with NA

[Alexandra Catena]

Hello All,

I have a data frame of two columns for wind.  The first column is for wind
speed and the second wind direction.  I'm trying to replace the 9999 values
in the first column and the 999 values in the second column with NA.  I
tried to use the function ltdl.fix.df but it doesn't seem to do anything.

> ltdl.fix.df(windMV, zero2na = FALSE, coded = 999)

  n = 9432 by p = 4 matrix checked, 0 NA(s) present

  0 factor variable(s) present

  5675 value(s) coded 999 set to NA

  0 -ve value(s) set to +ve half the negative value


I have R version 3.1.1

Thanks,
Alexandra

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