R - brevity when subsetting? -

i'm still new r , of subsetting via pattern:
data[ command produces logical same length data ]
or
subset( data , command produces logical same length data )

for example:

test = c("a", "b","c") ignore = c("b") result = test[ !( test %in% ignore ) ] result = subset( test , !( test %in% ignore ) ) 

but vaguely remember readings there's shorter/(more readable?) way this? perhaps using "with" function?

can list alternative example above me understand options in subsetting?

i don't know of more succinct way of subsetting specific example, using vectors. may thinking of, regarding with, subsetting data frames based on conditions using columns data frame. example:

dat <- data.frame(variable1 = runif(10), variable2 = letters[1:10]) 

if want grab subset of dat based on condition using variable1 this:

dat[dat$variable1 < 0,] 

or can save ourselves having write dat$* each time using with:

with(dat,dat[variable1 < 0,]) 

now, you'll notice didn't save keystrokes doing in case. if have data frame long name, , complicated condition can save bit. see related ?within command if you're altering data frame in question.

alternatively, can use subset can same thing:

subset(dat, variable1 < 0) 

subset can handle conditions on columns via select argument.