Rcmdr.Utilities
Rcmdr Utility Functions
These functions support writing additions to the Rcmdr package. Additional R code
can be placed in files with file type .R in the etc subdirectory
of the package. Add menus, submenus, and menu items by editing the file
Rcmdr-menus.txt in the same directory.
- Keywords
- misc
Usage
activateMenus()
activeDataSet(dsname, flushModel=TRUE)
ActiveDataSet(name)
activeDataSetP()
activeModel(model)
ActiveModel(name)
activeModelP()
checkActiveDataSet()
checkActiveModel()
checkBoxes(window=top, frame, boxes, initialValues=NULL, labels) # macro
checkClass(object, class, message=NULL) # macro
checkFactors(n=1)
checkMethod(generic, object, message=NULL, default=FALSE, strict=FALSE,
reportError=TRUE) # macro
checkNumeric(n=1)
checkReplace(name, type=gettextRcmdr("Variable"))
checkTwoLevelFactors(n=1)
checkVariables(n=1)
closeCommander(ask=TRUE, ask.save=ask)
closeDialog(window, release=TRUE) # macro
CommanderWindow()
dataSetsP()
defmacro(..., expr)
dialogSuffix(window=top, onOK=onOK, rows=1, columns=1, focus=top, bindReturn=TRUE,
preventGrabFocus=FALSE, preventDoubleClick=FALSE, preventCrisp=FALSE) # macro
doItAndPrint(command, log=TRUE)
errorCondition(window=top, recall=NULL, message, model=FALSE) # macro
exists.method(generic, object, default=TRUE, strict=FALSE)
Factors(names)
factorsP(n=1)
## S3 method for class 'listbox':
getFrame(object)
## S3 method for class 'listbox':
getSelection(object)
getRcmdr(x, mode="any")
gettextRcmdr(...)
glmP()
GrabFocus(value)
groupsBox(recall=NULL, label=gettextRcmdr("Plot by:"),
initialLabel=gettextRcmdr("Plot by groups"),
plotLinesByGroup=FALSE, positionLegend=FALSE,
plotLinesByGroupsText=gettextRcmdr("Plot lines by group")) # macro
groupsLabel(frame=top, groupsBox=groupsBox, columnspan=1) # macro
hclustSolutionsP()
initializeDialog(window=top, title="", offset=10, preventCrisp=FALSE) # macro
is.valid.name(x)
justDoIt(command)
listAllModels(envir=.GlobalEnv, ...)
listDataSets(envir=.GlobalEnv, ...)
listFactors(dataSet=ActiveDataSet())
listGeneralizedLinearModels(envir=.GlobalEnv, ...)
listLinearModels(envir=.GlobalEnv, ...)
listMultinomialLogitModels(envir=.GlobalEnv, ...)
listNumeric(dataSet=ActiveDataSet())
listPlugins(loaded=FALSE)
listProportionalOddsModels(envir=.GlobalEnv, ...)
listTwoLevelFactors(dataSet=ActiveDataSet())
listVariables(dataSet=ActiveDataSet())
lmP()
logger(command)
LogWindow()
Message(message, type=c("note", "error", "warning"))
MessagesWindow()
modelFormula(frame=top, hasLhs=TRUE) # macro
modelsP(n=1)
Numeric(names)
numericP(n=1)
OKCancelHelp(window=top, helpSubject=NULL, model=FALSE) # macro
OutputWindow()
packageAvailable(name)
putRcmdr(x, value)
radioButtons(window=top, name, buttons, values=NULL, initialValue=..values[1],
labels, title) # macro
RcmdrTclSet(name, value)
RcmdrTkmessageBox(message, icon=c("info", "question", "warning",
"error"), type=c("okcancel", "yesno", "ok"), default, title="")
rglLoaded()
subOKCancelHelp(window=subdialog, helpSubject=NULL) # macro
subsetBox(window=top, model=FALSE) # macro
trim.blanks(text)
TwoLevelFactors(names)
twoLevelFactorsP(n=1)
UpdateModelNumber(increment=1)
variableListBox(parentWindow, variableList=Variables(), bg="white",
selectmode="single", export="FALSE", initialSelection=NULL,
listHeight = 4, title)
Variables(names)
# the following function is exported for technical reasons,
# but is not meant to be called directly
commanderPosition()Arguments
- ask
- ask for confirmation.
- ask.save
- ask whether to save contents of script and output windows.
- bg
- background color.
- bindReturn
- if
TRUE, the Return key is bound to theonOKfunction in the dialog. - boxes
- vector of quoted names for check boxes, used to generate each box and its associated variable.
- buttons
- vector of quoted names for buttons in a set of related radio buttons.
- class
- quoted name of class.
- columnspan
- number of dialog-box columns to be spanned by frame.
- command
- a character string that evaluates to an R command.
- dataSet, dsname
- the quoted name of a data frame in memory.
- default
- default button: if not specified, "ok" for "okcancel", "yes" for "yesno", and "ok" for "ok"; or look for a default method.
- envir
- the environment to be searched; should generally be left at the default.
- export
- export selection?
- expr
- expression constituting the body of the macro; typically a compound expression.
- flushModel
- set (or reset) the active model to NULL? Should normally be
TRUEwhen the active data set is changed; an exception is when variables are simply added to, deleted from, or modified in the data set set. - focus
- Tk window to get the focus.
- frame
- frame or quoted name for frame depending upon the function.
- generic
- quoted name of generic function.
- groupsBox
- listbox object for selecting groups variable.
- hasLhs
- does the model formula have a left-hand side?
- helpSubject
- the quoted name of a help subject, to be called as
help(helpSubject)when the dialog Help button is pressed. - icon
- Message-box icon.
- increment
- increment to model number; -1 to set back after error.
- initialLabel
- label for groups button before a selection is made.
- initialSelection
- index of item initially selected, 0-base indexing.
- initialValue
- for a set of related radio buttons.
- initialValues
- for a set of related check boxes.
- label
- label prefix for groups button after a selection is made.
- labels
- a vector of character strings to label a set of radio buttons or check boxes.
- listHeight
- Maximum number of elements displayed simultaneously in list box.
- loaded
- if
TRUE, plug-in packages that are loaded are included in the vector of names returned. - log
- echo command to the log window, as well as executing it and printing its output.
- message
- error (or other) message.
- mode
- mode of object to retrieve.
- model
- the name of a model, as a character string, or
TRUEorFALSE, depending upon the function. - name
- quoted name.
- names
- optional names to be stored.
- n
- number of items to check for.
- object
- an object (depends on context).
- offset
- in pixels, from top-left of Commander window.
- onOK
- function to execute when the OK button is pressed.
- plotLinesByGroup
- include a check box for plotting lines by group?
- plotLinesByGroupsText
- the label for the plot-lines-by-group check box.
- positionLegend
- include a check box for a legend?
- preventGrabFocus
- prevent the dialog box from grabbing the focus.
- preventDoubleClick
- prevent double-clicking from pressing the OK button, even when the double.click option is set; necessary for statistical modelling dialogs, which use double-clicking to build the model formula.
- preventCrisp
- prevent call to
tclServiceMode, which (rarely) causes problems with some dialogs. - recall
- function to call after error --- usually the function that initiates the dialog.
- release
- release the focus if the grab.focus option has been set.
- reportError
- if
TRUE, report an error message. - rows, columns
- numbers of rows and columns of widgets in the dialog box.
- values
- vector of quoted values associated with radio buttons or check boxes.
- selectmode
"single"or"multiple".- strict
- if
TRUE, only use first element of class vector. - text
- a text string.
- title
- Window or dialog-box-element title.
- type
- quoted type of object to check; used to generate check-replace dialog box; or type of message to print in Message window.
- value
- an object to be stored.
- variableList
- a vector of variable names.
- window, parentWindow
- a Tk window.
- x
- an R object name, as a character string.
- ...
- For
gettextRcmdr, text string or vector of text strings to translate; fordefmacro, arguments for the macro; otherwise disregard.
Details
There are several groups of functions exported by the Rcmdr package and documented briefly here.
To see how these functions work, it is simplest to examine the dialog-generating functions in the Rcmdr package.
Executing and logging commands:
The functions doItAndPrint, justDoIt, and logger control the
execution, logging, and printing of commands generated by menus and dialogs.
logger(command) adds command to the log/script window and to the output window.
justDoIt(command) causes command
to be executed. doItAndPrint(command) does both of these operations, and also prints the
output produced by the command.
Checking for errors:
The function is.valid.name checks whether a character string specifies a valid name
for an R object. The functions checkActiveDataSet, checkActiveModel,
checkFactors, checkNumeric, checkTwoLevelFactors, and checkVariables
check for the existence of objects and write an error message to the log if they are absent
(or insufficiently numerous, in the case of different kinds of variables). The function
checkReplace opens a dialog to query whether an existing object should be replaced.
The function checkMethod, checks whether a method exists for a particular generic that is
appropriate for a particular object. The function checkClass checks whether an object is of
a specific class. Both of these functions write error messages to the log if the condition fails.
The function errorCondition reports an error to the user and (optionally) re-starts
a dialog.
Information:
Several functions return vectors of object names: listAllModels,
listDataSets, listGeneralizedLinearModels,
listFactors, listLinearModels, listMultinomialLogitModels,
listNumeric, listProportionalOddsModels,
listTwoLevelFactors,
listVariables. The functions activeDataSet and activeModel respectively report or set the active
data set and model.
The function packageAvailable reports whether the named package is
available to be loaded (or has possibly already been loaded).
The function exists.method checks whether a method exists for a particular generic that is
appropriate for a particular object, and returns TRUE or FALSE.
Building dialog boxes:
Several functions simplify the process of constructing Tk dialogs:
initializing a dialog box, initializeDialog, and completing the definition of a dialog box, dialogSuffix;
a set of check boxes, checkBoxes;
a set of radio buttons, radioButtons;
a list box with associated scrollbars and state variable, variableListBox
(and the associated functions getFrame and getSelection);
a button and subdialog for selecting a "grouping" variable, groupsBox;
displaying the currently defined groups in a dialog, groupsLabel;
a dialog-box structure for entering a model formula, modelFormula;
a text box for entering a subsetting expression, subsetBox;
OK, Cancel, and Help buttons for dialogs, OKCancelHelp, and subdialogs, subOKCancelHelp.
Translating text:
The gettextRcmdr function simply passes its argument(s) to
gettext, adding the argument domain="R-Rcmdr".
Miscellaneous:
The function trim.blanks removes spaces from the beginning and end of a character string. The function
installPlugin installs an Rcmdr plug-in from a ZIP file or directory; this function may be used to
create self-installing plug-ins in the form of packages.
Some of these functions, marked # macro under Usage, are "macro-like" in their behaviour, in that they
execute in the environment from which they are called. These were defined with an adaptation (used with permission) of
Thomas Lumley's defmacro function, described in Lumley (2001).
References
T. Lumley (2001) Programmer's niche: Macros in R. R News, 1(3), 11--13.