new to R and not familiar with the language

General
1

I go this error and I and I am not sure what is going on because there are 3 different vaccines.

Error in $<-.data.frame(*tmp*, "VaccType", value = logical(0)) :
replacement has 0 rows, data has 31

any thoughts

2

Please show the code you ran that produced this error.

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3 
breastmilk$VaccType=ifelse(breastmilk$vaccinetype=="Pf",0,1)
Error in `$<-.data.frame`(`*tmp*`, "VaccType", value = logical(0)) : 
  replacement has 0 rows, data has 31
4

You might want to show the data too. dput(breastmilk) then copy and paste.

5

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