Filter lens

Create a lawful lens into the result of a filter. This focuses only columns not involved in the filter condition.

filter_l(...)

Arguments

...	unquoted NSE filter arguments

Examples

head(view(iris, filter_l(Species == "setosa"))) # Note Species is not seen
#>   Sepal.Length Sepal.Width Petal.Length Petal.Width
#> 1          5.1         3.5          1.4         0.2
#> 2          4.9         3.0          1.4         0.2
#> 3          4.7         3.2          1.3         0.2
#> 4          4.6         3.1          1.5         0.2
#> 5          5.0         3.6          1.4         0.2
#> 6          5.4         3.9          1.7         0.4
head(over(iris, filter_l(Species == "setosa"), function(x) x + 10))
#>   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
#> 1         15.1        13.5         11.4        10.2  setosa
#> 2         14.9        13.0         11.4        10.2  setosa
#> 3         14.7        13.2         11.3        10.2  setosa
#> 4         14.6        13.1         11.5        10.2  setosa
#> 5         15.0        13.6         11.4        10.2  setosa
#> 6         15.4        13.9         11.7        10.4  setosa