vis_expect {visdat} | R Documentation |
Visualise whether a value is in a data frame
Description
vis_expect
visualises certain conditions or values in your data. For
example, If you are not sure whether to expect -1 in your data, you could
write: vis_expect(data, ~.x == -1)
, and you can see if there are times
where the values in your data are equal to -1. You could also, for example,
explore a set of bad strings, or possible NA values and visualise where
they are using vis_expect(data, ~.x %in% bad_strings)
where
bad_strings
is a character vector containing bad strings like N A
N/A
etc.
Usage
vis_expect(data, expectation, show_perc = TRUE)
Arguments
data |
a data.frame |
expectation |
a formula following the syntax: |
show_perc |
logical. TRUE now adds in the \ TRUE or FALSE in the whole dataset into the legend. Default value is TRUE. |
Value
a ggplot2 object
See Also
vis_miss()
vis_dat()
vis_guess()
vis_cor()
vis_compare()
Examples
dat_test <- tibble::tribble(
~x, ~y,
-1, "A",
0, "B",
1, "C",
NA, NA
)
vis_expect(dat_test, ~.x == -1)
vis_expect(airquality, ~.x == 5.1)
# explore some common NA strings
common_nas <- c(
"NA",
"N A",
"N/A",
"na",
"n a",
"n/a"
)
dat_ms <- tibble::tribble(~x, ~y, ~z,
"1", "A", -100,
"3", "N/A", -99,
"NA", NA, -98,
"N A", "E", -101,
"na", "F", -1)
vis_expect(dat_ms, ~.x %in% common_nas)