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