Hello, Working on a little primer to ease the transition from SPSS to R, I have encountered two problems with write.foreign.
One is cosmetic (but still annoying): the text data files will contain "NA" for missing values. Each time SPSS encounters an NA, it will print a warning. This could be easily avoided by calling write.table (which I suppose write.foreign uses) with na=",,". That's right, two commas. The second is more serious: character variables are not read at all because they are not specified correctly in the SPSS syntax file. A string variable has to be specified with a preceding asterisk and a type and length indicator. Suppose mydf contained a numerical variable "a" and a string variable "b" with max(nchar(mydf$b))==10. What write.foreign(mydf,...,package="SPSS") writes is: DATA FILE filename.dat free / a b. What it should write, however, is: DATA FILE filename.dat free / a * b (A10). ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
