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Infix Operators for Detection, Subsetting and Replacement

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moodymudskipper/inops

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CRAN versiondependencies

inops

Package implementing additional infix operators for R.

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

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

Detection Operators

FormDescriptionCall
%in{}%which elements are inside a setx %in{}% set
%in[]%which elements are inside a closed intervalx %in[]% interval
%in()%which elements are inside an open intervalx %in()% interval
%in[)%which elements are inside an interval open on the rightx %in[)% interval
%in(]%which elements are inside an interval open on the leftx %in(]% interval
%in~%which elements match a regular expressionx %in~% pattern
%in~p%which elements match a regular perl expressionx %in~p% pattern
%in~f%which elements match a regular fixed expressionx %in~f% pattern
%in#%which elements occur a specified number of timesx %in#% count
%out%which elements are outside a set (same as ! x %in% y)x %out% set
%out{}%which elements are outside a setx %out{}% set
%out[]%which elements are outside a closed intervalx %out[]% interval
%out()%which elements are outside an open intervalx %out()% interval
%out[)%which elements are outside an interval open on the rightx %out[)% interval
%out(]%which elements are outside an interval open on the leftx %out(]% interval
%out~%which elements do not match a regular expressionx %out~% pattern
%out~p%which elements do not match a regular perl expressionx %out~p% pattern
%out~f%which elements do not match a regular fixed expressionx %out~f% pattern
%out#%which elements occur other than a specified number of timesx %out#% count

Subsetting Operators

FormDescriptionCall
%[==%select elements equal to the provided valuex %[==% element
%[!=%select elements not equal to the provided valuex %[!=% element
%[>%select elements greater than the provided valuex %[>% number
%[<%select elements lower than the provided valuex %[<% number
%[>=%select elements greater or equal to the provided valuex %[>=% number
%[<=%select elements lower or equal to the provided valuex %[<=% number
%[in%select elements inside a setx %[in% set
%[in{}%select elements inside a setx %[in{}% set
%[in[]%select elements inside a closed intervalx %[in[]% interval
%[in()%select elements inside an open intervalx %[in()% interval
%[in[)%select elements inside an interval open on the rightx %[in[)% interval
%[in(]%select elements inside an interval open on the leftx %[in(]% interval
%[in~%select elements matching a regular expressionx %[in~% pattern
%[in~p%select elements matching a regular perl expressionx %[in~p% pattern
%[in~f%select elements matching a regular fixed expressionx %[in~f% pattern
%[in#%select elements that occur a specified number of timesx %[in#% count
%[out%select elements outside a setx %[out% set
%[out{}%select elements outside a setx %[out{}% set
%[out[]%select elements outside a closed intervalx %[out[]% interval
%[out()%select elements outside an open intervalx %[out()% interval
%[out[)%select elements outside an interval open on the rightx %[out[)% interval
%[out(]%select elements outside an interval open on the leftx %[out(]% interval
%[out~%select elements not matching a regular expressionx %[out~% pattern
%[out~p%select elements not matching a regular perl expressionx %[out~p% pattern
%[out~f%select elements not matching a regular fixed expressionx %[out~f% pattern
%[out#%select elements that occur other than specified number of timesx %[out% count

Replacement Operators

FormDescriptionCall
==<-change elements equal to the provided valuex == element <- value
!=<-change elements not equal to the provided valuex != element <- value
><-change elements greater than the provided valuex > number <- value
<<-change elements lower than the provided valuex < number <- value
>=<-change elements greater or equal to the provided valuex >= number <- value
<=<-change elements lower or equal to the provided valuex <= number <- value
%in%<-change elements inside a setx %in% set <- value
%in{}%<-change elements inside a setx %in{}% set <- value
%in[]%<-change elements inside a closed intervalx %in[]% interval <- value
%in()%<-change elements inside an open intervalx %in()% interval <- value
%in[)%<-change elements inside an interval open on the rightx %in[)% interval <- value
%in(]%<-change elements inside an interval open on the leftx %in(]% interval <- value
%in~%<-change elements matching a regular expressionx %in~% pattern <- value
%in~p%<-change elements matching a regular perl expressionx %in~p% pattern <- value
%in~f%<-change elements matching a regular fixed expressionx %in~f% pattern <- value
%in#%<-change elements that occur specified number of timesx %in#% count <- value
%out%<-change elements outside a setx %out% set <- value
%out{}%<-change elements outside a setx %out{}% set <- value
%out[]%<-change elements outside a closed intervalx %out[]% interval <- value
%out()%<-change elements outside an open intervalx %out()% interval <- value
%out[)%<-change elements outside an interval open on the rightx %out[)% interval <- value
%out(]%<-change elements outside an interval open on the leftx %out(]% interval <- value
%out~%<-change elements not matching a regular expressionx %out~% pattern <- value
%out~p%<-change elements not matching a regular perl expressionx %out~p% pattern <- value
%out~f%<-change elements not matching a regular fixed expressionx %out~f% pattern <- value
%out#%<-change elements that occur other than specified number of timesx %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. Thisdoesn’t affect the behavior of the<<- assignments.

  1. Behaviour

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

Subsetting and replacement operators are wrappers around detectionoperators.
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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