%>% sends the object to the file. The object is printed to the file
according to the function specified in the operators.print option supplied with this package,
most likely to be the print function. See examples.
%>>% appends the output to the file.
%2>% sends the message stream to the file by sinking the
message stream to the file. See sink for details.
%2>>% appends the message stream to the file.
%*>% sends both output and message streams to the file. %*>>% appends them.
%<%< code=""> reads the content of the file into the object. %<<%< code=""> appends the
content of the file to the object.%<>%<>