Replacing Values by Comparison

Description

Operators for replacing values using the standard comparison operators.

Usage

x >= y <- value

x > y <- value

x <= y <- value

x < y <- value

x == y <- value

x != y <- value

Arguments

Details

Thanks to these operators :

• x == y <- value is equivalent to x[x == y] <- value

• x != y <- value is equivalent to x[x != y] <- value

• x <= y <- value is equivalent to x[x <= y] <- value

• x >= y <- value is equivalent to x[x >= y] <- value

• x < y <- value is equivalent to x[x < y] <- value

• x > y <- value is equivalent to x[x > y] <- value

Value

x with values for which the comparisons evaluate to TRUE replaced with value.

See Also

`==`

Examples

ages <- c(130, 10, 1996, 21, 39, 74, -2, 0)

ages == 1996 <- as.numeric(format(Sys.Date(), "%Y")) - 1986
ages

ages > 100 <- NA
ages

ages <= 0 <- NA
ages

Subsetting Values by Comparison

Description

Operators for subsetting values using the standard comparison operators.

Usage

x %[>=% y

x %[>% y

x %[<=% y

x %[<% y

x %[==% y

x %[!=% y

Arguments

Value

elements of x matched by the used comparison.

See Also

`==`

Examples

ages <- c(130, 10, 21, 39, 74, -2, 0)
ages %[<% 5

letters %[==% "a"

letters %[!=% "a"

Matching Values and Intervals

Description

Operators for detecting which values are within a given interval or set.

Usage

x %in{}% table

x %out{}% table

x %in[]% interval

x %out[]% interval

x %in()% interval

x %out()% interval

x %in(]% interval

x %out(]% interval

x %in[)% interval

x %out[)% interval

x %in~% pattern

x %out~% pattern

x %in~p% pattern

x %out~p% pattern

x %in~f% pattern

x %out~f% pattern

x %in#% count

x %out#% count

Arguments

Details

Compared with default %in% implementation in R the operators implemented here try to be more consistent with other default infix operators like == and <. In particular they preserve the dimensions and the missing values (see examples).

Style of parentheses define the type of matching template:

• %in{}% detects which elements of x are present in the set given by the table argument.

• %in()%, %in[]%, %in(]% and %in[)% detect the elements of x included in a range of interval argument, using range(interval). This range being closed, open on both sides, open on the left, or open on the right, respectively.

• %in~%, %in~p% and %in~f% detect the elements of x that match the regular expression given by pattern. They wrap grepl() with the default parameters of perl = TRUE, and with fixed = TRUE, respectively.

• %in#% detects the elements that occur a specified number of times. Operators of the form %out<suffix>% return the negation of %in<suffix>%

Value

a logical vector or an array of the same dimensions as x indicating if each value of x is within the defined subset.

See Also

%in%

Examples

# difference in behaviour with dimensions when compared to %in%
iris[1:10,] %in% "setosa"
iris[1:10,] == "setosa"
iris[1:10,] %in{}% "setosa"

# difference in behaviour with missing values when compared to %in%
x <- c(1,2,3,NA,4)
x %in% c(1,2,3)
x %in{}% c(1,2,3)

# other interval oparators
x <- 1:10
x %in[]% c(3,7)
x %in()% c(3,7)
x %in(]% c(3,7)
x %in[)% c(3,7)
x %out[]% c(3,7)

# when more than 2 numbers are provided for the interval - range is used
x <- 1:10
all.equal(x %in[]% c(2,4), x %in[]% c(2,3,4))
all.equal(x %in[]% c(2,4), x %in[]% range(c(2,3,4)))

# matching according to regular expressions
iris$Species %in~% "^v"
iris$Species %in~f% "^v"
iris$Species %in~f% "versicolor"
iris$Species %in~f% c("versicolor", "virginica")

# selecting by number of occurances
mtcars$gear %in#% 1:5
mtcars$gear %out#% 1:5

Replacing Values and Intervals

Description

Operators for replacing values within a given interval or set.

Usage

x %in{}% table <- value

x %out{}% table <- value

x %in[]% interval <- value

x %out[]% interval <- value

x %in()% interval <- value

x %out()% interval <- value

x %in(]% interval <- value

x %out(]% interval <- value

x %in[)% interval <- value

x %out[)% interval <- value

x %in~% pattern <- value

x %out~% pattern <- value

x %in~f% pattern <- value

x %out~f% pattern <- value

x %in~p% pattern <- value

x %out~p% pattern <- value

x %in% table <- value

x %out% table <- value

x %in#% count <- value

x %out#% count <- value

Arguments

Details

For each %*%<- operator of this package x %*% y <- value is a shorthand for x[x %*% y] <- value.

Value

x with specified values replaced with value.

See Also

%in{}%

Examples

# interval replacement operators
x <- 1:10
x %in[]% c(3,7) <- 0
x

x <- 1:10
x %in[)% c(3,7) <- NA
x

x <- 1:10
x %out[)% c(3,7) <- x
x

# regular expression replacement operators
region <- as.character(state.region)
table(region)
region %in~% "^North" <- "North"
table(region)

# count based replacement operators
carb <- mtcars$carb
table(carb, useNA="always")
carb %in#% 1 <- NA
table(carb, useNA="always")

Subsetting Values and Intervals

Description

Operators for subsetting values within a given interval or set.

Usage

x %[in{}% table

x %[out{}% table

x %[in[]% interval

x %[out[]% interval

x %[in()% interval

x %[out()% interval

x %[in(]% interval

x %[out(]% interval

x %[in[)% interval

x %[out[)% interval

x %[in~% pattern

x %[out~% pattern

x %[in~p% pattern

x %[out~p% pattern

x %[in~f% pattern

x %[out~f% pattern

x %[in% table

x %[out% table

x %[in#% count

x %[out#% count

Arguments

Details

For each %[*% operator of this package x %[*% y is a shorthand for x[x %*% y].

Value

elements of x matched by the used infix operator type.

See Also

%in{}%

Examples

# interval subsetting operators
x <- 1:10
x %[in[]% c(3,7)
x %[in[)% c(3,7)
x %[out[)% c(3,7)

# regular expression subsetting operators
carnames <- rownames(mtcars)
carnames %[in~% "^Mazda"
carnames %[in~% c("^Mazda", "^Merc")
carnames %[in~% c("\\w{10,100}$")  # long car names

# count-based subsetting operators
mtcars$cyl %[in#% 1:10
mtcars$cyl %[out#% 1:10

Detect values that don't match

Description

%out% is the negation of %in%, so x %out% y is equivalent to ! x %in% y.

Usage

x %out% table

Arguments

Value

a logical vector or of the same length as x indicating if each value of x is within the defined subset.

See Also

%in%

Examples

iris$Species %in% c("setosa", "versicolor")
iris$Species %out% c("setosa", "versicolor")