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Data set in database R with missing values

Are there examples of a dataset in database R that contain missing values? I looked at each one in turn, and also searched with google - nothing so far.

library(MASS) data()

Edit: I know how to add missing values ​​to a dataset in R, I just want to know if any such datasets exist.

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airquality is in the database and has some NA in it

 > summary(airquality) Ozone Solar.R Wind Temp Month Day Min. : 1.00 Min. : 7.0 Min. : 1.700 Min. :56.00 Min. :5.000 Min. : 1.0 1st Qu.: 18.00 1st Qu.:115.8 1st Qu.: 7.400 1st Qu.:72.00 1st Qu.:6.000 1st Qu.: 8.0 Median : 31.50 Median :205.0 Median : 9.700 Median :79.00 Median :7.000 Median :16.0 Mean : 42.13 Mean :185.9 Mean : 9.958 Mean :77.88 Mean :6.993 Mean :15.8 3rd Qu.: 63.25 3rd Qu.:258.8 3rd Qu.:11.500 3rd Qu.:85.00 3rd Qu.:8.000 3rd Qu.:23.0 Max. :168.00 Max. :334.0 Max. :20.700 Max. :97.00 Max. :9.000 Max. :31.0 NA :37 NA :7
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The VIM package has some nice examples of data sets with missing data. I use the sleep dataset from this package when I teach no imputation values.

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