Opposite of in exclude rows with values specified in a vector

Question

A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z  I want to create a subset D2  which excludes some values  say  B  N and T  Basically  I want a command which is the opposite of  in   D2   subset D1  V1  in  c  B   N  T

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This works fine for me    nin    lt - Negate   in

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Here is a version using filter in dplyr that applies the same technique as the accepted answer by negating the logical with     D2  lt - D1   gt   dplyr  filter  V1  in  c  B   N   T

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The help for  in   help   in     includes  in the Examples section  this definition of not in      w o    lt - function x  y  x  x  in  y   --  x without y  Lets try it   c 2 3 4   w o  c 2 8 9   1  3 4   Alternatively    w o    lt - function x  y   x  in  y  --  x without y c 2 3 4   w o  c 2 8 9     1  FALSE  TRUE  TRUE

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Instead of creating your own function  it would be useful to just negate the behavior of needle  in  haystack   do this instead    needle  in  haystack   this works as well

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purrr  compose   is another quick way to define this for later use  as in      in    lt - compose        in

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library roperators   1  ni  2 10  If you frequently need to use custom infix operators  it is easier to just have them in a package rather than declaring the same exact functions over and over in each script or project

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Hmisc has  nin  function  which should do this   https   www rdocumentation org packages Hmisc versions 4 4-0 topics  25nin 25

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Using negate from purrr also does the trick quickly and neatly     not in    lt - purrr  negate   in      Then usage is  for example   c  cat    dog    not in  c  dog    mouse

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The package collapse has it built in    in

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How about     ni    lt - Negate   in    c 1 3 11   ni  1 10    1  FALSE FALSE  TRUE

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You can use the   operator to basically make any TRUE FALSE and every FALSE TRUE  so   D2   subset D1    V1  in  c  B   N   T       EDIT  You can also make an operator yourself      in    lt - function x y     in   x y    c 1 3 11   in 1 10  1  FALSE FALSE  TRUE

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If you look at the code of  in    function  x  table  match x  table  nomatch   0L   gt  0L   then you should be able to write your version of opposite  I use    not in    lt - function  x  table  is na match x  table  nomatch NA integer      Another way is   function  x  table  match x  table  nomatch   0L     0L

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Another solution could be using setdiff  D1   c  A        Z     D0   c  B   N   T    D2   setdiff D1  D0    D2 is your desired subset

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require TSDT   c 1 3 11   nin  1 10    1  FALSE FALSE  TRUE   For more information  you can refer to  https   cran r-project org web packages TSDT TSDT pdf

[r] Opposite of %in%: exclude rows with values specified in a vector

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