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Infix Operators for Detection, Subsetting and Replacement
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README.md

CRAN version dependencies

inops

Package implementing additional infix operators for R.

Implemented operators work with 4 different value types: sets, intervals, regular expressions, and counts.
And provide 3 distinct functionalities: detection, subsetting, and replacement.

inops_operator_table

For more examples please see the vignette.
For a complete list of available operators consult the tables below.

Syntax

All operators have the same form composed of two distinct parts: %<operation><type>%.

  • [operation] specifies the performed functionality and can be one of in, out, [in, [out.
  • [type] specifies the type of operation and can be one of {}, [], (), [), (], ~, ~p, ~f, #.

Detection Operators

Form Description Call
%in{}% which elements are inside a set x %in{}% set
%in[]% which elements are inside a closed interval x %in[]% interval
%in()% which elements are inside an open interval x %in()% interval
%in[)% which elements are inside an interval open on the right x %in[)% interval
%in(]% which elements are inside an interval open on the left x %in(]% interval
%in~% which elements match a regular expression x %in~% pattern
%in~p% which elements match a regular perl expression x %in~p% pattern
%in~f% which elements match a regular fixed expression x %in~f% pattern
%in#% which elements occur a specified number of times x %in#% count
%out% which elements are outside a set (same as ! x %in% y) x %out% set
%out{}% which elements are outside a set x %out{}% set
%out[]% which elements are outside a closed interval x %out[]% interval
%out()% which elements are outside an open interval x %out()% interval
%out[)% which elements are outside an interval open on the right x %out[)% interval
%out(]% which elements are outside an interval open on the left x %out(]% interval
%out~% which elements do not match a regular expression x %out~% pattern
%out~p% which elements do not match a regular perl expression x %out~p% pattern
%out~f% which elements do not match a regular fixed expression x %out~f% pattern
%out#% which elements occur other than a specified number of times x %out#% count

Subsetting Operators

Form Description Call
%[==% select elements equal to the provided value x %[==% element
%[!=% select elements not equal to the provided value x %[!=% element
%[>% select elements greater than the provided value x %[>% number
%[<% select elements lower than the provided value x %[<% number
%[>=% select elements greater or equal to the provided value x %[>=% number
%[<=% select elements lower or equal to the provided value x %[<=% number
%[in% select elements inside a set x %[in% set
%[in{}% select elements inside a set x %[in{}% set
%[in[]% select elements inside a closed interval x %[in[]% interval
%[in()% select elements inside an open interval x %[in()% interval
%[in[)% select elements inside an interval open on the right x %[in[)% interval
%[in(]% select elements inside an interval open on the left x %[in(]% interval
%[in~% select elements matching a regular expression x %[in~% pattern
%[in~p% select elements matching a regular perl expression x %[in~p% pattern
%[in~f% select elements matching a regular fixed expression x %[in~f% pattern
%[in#% select elements that occur a specified number of times x %[in#% count
%[out% select elements outside a set x %[out% set
%[out{}% select elements outside a set x %[out{}% set
%[out[]% select elements outside a closed interval x %[out[]% interval
%[out()% select elements outside an open interval x %[out()% interval
%[out[)% select elements outside an interval open on the right x %[out[)% interval
%[out(]% select elements outside an interval open on the left x %[out(]% interval
%[out~% select elements not matching a regular expression x %[out~% pattern
%[out~p% select elements not matching a regular perl expression x %[out~p% pattern
%[out~f% select elements not matching a regular fixed expression x %[out~f% pattern
%[out#% select elements that occur other than specified number of times x %[out% count

Replacement Operators

Form Description Call
==<- change elements equal to the provided value x == element <- value
!=<- change elements not equal to the provided value x != element <- value
><- change elements greater than the provided value x > number <- value
<<- change elements lower than the provided value x < number <- value
>=<- change elements greater or equal to the provided value x >= number <- value
<=<- change elements lower or equal to the provided value x <= number <- value
%in%<- change elements inside a set x %in% set <- value
%in{}%<- change elements inside a set x %in{}% set <- value
%in[]%<- change elements inside a closed interval x %in[]% interval <- value
%in()%<- change elements inside an open interval x %in()% interval <- value
%in[)%<- change elements inside an interval open on the right x %in[)% interval <- value
%in(]%<- change elements inside an interval open on the left x %in(]% interval <- value
%in~%<- change elements matching a regular expression x %in~% pattern <- value
%in~p%<- change elements matching a regular perl expression x %in~p% pattern <- value
%in~f%<- change elements matching a regular fixed expression x %in~f% pattern <- value
%in#%<- change elements that occur specified number of times x %in#% count <- value
%out%<- change elements outside a set x %out% set <- value
%out{}%<- change elements outside a set x %out{}% set <- value
%out[]%<- change elements outside a closed interval x %out[]% interval <- value
%out()%<- change elements outside an open interval x %out()% interval <- value
%out[)%<- change elements outside an interval open on the right x %out[)% interval <- value
%out(]%<- change elements outside an interval open on the left x %out(]% interval <- value
%out~%<- change elements not matching a regular expression x %out~% pattern <- value
%out~p%<- change elements not matching a regular perl expression x %out~p% pattern <- value
%out~f%<- change elements not matching a regular fixed expression x %out~f% pattern <- value
%out#%<- change elements that occur other than specified number of times x %out#% count <- value

Notes

  1. Overloading

To give an assignment counterpart to < we had to overload the <<- operator, which explains the message when attaching the package. This doesn’t affect the behavior of the <<- assignments.

  1. Behaviour

Detection operators should be seen as an extension of the standard infix operators implemented in R (i.e. ==, >, etc). For this reason the implemented operators differ from standard %in% and behave more like == on data.frames and objects with NA values.

Subsetting and replacement operators are wrappers around detection operators.
Subsetting: x[ x %in{}% set].
Replacement: replace(x, x %in{}% set, value).

See Also

Other similar packages you might be interested in.

  1. intrval
  2. operators
  3. infix
  4. invctr
  5. grapes
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