Scripting
A new feature in 3.4 is that you can write scripts for using in 4. For example, if you want to define a new function f(x)=2sin x+3cos x, set its line width to 20 and then draw it, you type in a console:
qdbus org.kde.kmplot-PID /parser org.kde.kmplot.Parser.addFunction "f(x)=2sin x+3cos x" "" As a result, the new function's id number will be returned, or -1 if the function could not be defined.
qdbus org.kde.kmplot-PID /parser org.kde.kmplot.Parser.setFunctionFLineWidth ID 20 This command sets the function with the id number ID the line width to 20.
qdbus org.kde.kmplot-PID /view org.kde.kmplot.View.drawPlot This command repaints the window so that the function get visible.
A list of the available functions:
/kmplot org.kde.kmplot.KmPlot.fileOpen url 	 Load the file url.
/maindlg org.kde.kmplot.MainDlg.isModified 	 Returns true if any changes are done.
/maindlg org.kde.kmplot.MainDlg.checkModified 	 If there are any unsaved changes, a dialog appears to save, discard or cancel the plots.
/maindlg org.kde.kmplot.MainDlg.editAxes 	 Opens the coordinate system edit dialog.
/maindlg org.kde.kmplot.MainDlg.toggleShowSlider 	 Shows/hides parameter slider window.
/maindlg org.kde.kmplot.MainDlg.slotSave 	 Saves the functions (opens the save dialog if it is a new file).
/maindlg org.kde.kmplot.MainDlg.slotSaveas 	 The same as choosing File Save As in the menu.
/maindlg org.kde.kmplot.MainDlg.slotPrint 	 Opens the print dialog.
/maindlg org.kde.kmplot.MainDlg.slotResetView 	 The same as choosing View Reset View in the menu.
/maindlg org.kde.kmplot.MainDlg.slotExport 	 Opens the export dialog.
/maindlg org.kde.kmplot.MainDlg.slotSettings 	 Opens the settings dialog.
/maindlg org.kde.kmplot.MainDlg.slotNames 	 Shows the predefined math functions in the handbook.
/maindlg org.kde.kmplot.MainDlg.findMinimumValue 	 The same as choosing Tools Minimum Value... in the menu.
/maindlg org.kde.kmplot.MainDlg.findMaximumValue 	 The same as choosing Tools Maximum Value... in the menu.
/maindlg org.kde.kmplot.MainDlg.graphArea 	 The same as choosing Tools Plot Area in the menu.
/maindlg org.kde.kmplot.MainDlg.calculator 	 The same as choosing Tools Calculator in the menu.
/parser org.kde.kmplot.Parser.addFunction f_str0 f_fstr1 	 Adds a new function with the expressions f_str0 and f_str1. If the expression does not contain a function name, it will be auto-generated. The id number of the new function is returned, or -1 if the function could not be defined.
/parser org.kde.kmplot.Parser.removeFunction id 	 Removes the function with the id number id. If the function could not be deleted, false is returned, otherwise true.
/parser org.kde.kmplot.Parser.setFunctionExpression id eq f_str 	 Sets the expression for the function with the id number id to f_str. Returns true if it succeed, otherwise false.
/parser org.kde.kmplot.Parser.countFunctions 	 Returns the number of functions (parametric functions are calculated as two).
/parser org.kde.kmplot.Parser.listFunctionNames 	 Returns a list with all functions.
/parser org.kde.kmplot.Parser.fnameToID f_str 	 Returns the id number of f_str or -1 if the function name f_str was not found.
/parser org.kde.kmplot.Parser.functionFVisible id 	 Returns true if the function with the ID id is visible, otherwise false.
/parser org.kde.kmplot.Parser.functionF1Visible id 	 Returns true if the first derivative of the function with the ID id is visible, otherwise false.
/parser org.kde.kmplot.Parser.functionF2Visible id 	 Returns true if the second derivative of the function with the ID id is visible, otherwise false.
/parser org.kde.kmplot.Parser.functionIntVisible id 	 Returns true if the integral of the function with the ID id is visible, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionFVisible id visible 	 Shows the function with the ID id if visible is true. If visible is false, the function will be hidden. True is returned if the function exists, otherwise false
/parser org.kde.kmplot.Parser.setFunctionF1Visible id visible 	 Shows the first derivative of the function with the ID id if visible is true. If visible is false, the function will be hidden. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionF2Visible id visible 	 Shows the second derivative of the function with the ID id if visible is true. If visible is false, the function will be hidden. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionIntVisible id visible 	 Shows the integral of the function with the ID id if visible is true. If visible is false, the function will be hidden. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.functionStr id eq 	 Returns the function expression of the function with the ID id. If the function not exists, an empty string is returned instead.
/parser org.kde.kmplot.Parser.functionFLineWidth id 	 Returns the line width of the function with the ID id. If the function not exists, 0 is returned.
/parser org.kde.kmplot.Parser.functionF1LineWidth id 	 Returns the line width of the first derivative of the function with the ID id. If the function not exists, 0 is returned.
/parser org.kde.kmplot.Parser.functionF2LineWidth id 	 Returns the line width of the second derivative of the function with the ID id. If the function not exists, 0 is returned.
/parser org.kde.kmplot.Parser.functionIntLineWidth id 	 Returns the line width of the integral of the function with the ID id. If the function not exists, 0 is returned.
/parser org.kde.kmplot.Parser.setFunctionFLineWidth id linewidth 	 Sets the line width of the function with the ID id to linewidth. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionF1LineWidth id linewidth 	 Sets the line width of the first derivative of the function with the ID id to linewidth. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionF2LineWidth id linewidth 	 Sets the line width of the second derivative of the function with the ID id to linewidth. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionIntLineWidth id linewidth 	 Sets the line width of the integral of the function with the ID id to linewidth. True is returned if the function exists, otherwise false.
/parser org.kde.kmplot.Parser.functionParameterList id 	 Returns a list with all the parameter values for the function with the ID id.
/parser org.kde.kmplot.Parser.functionAddParameter id new_parameter 	 Adds the parameter value new_parameter to the function with the ID id. True is returned if the operation succeed, otherwise false.
/parser org.kde.kmplot.Parser.functionRemoveParameter id remove_parameter 	 Removes the parameter value remove_parameter from the function with the ID id. True is returned if the operation succeed, otherwise false.
/parser org.kde.kmplot.Parser.functionMinValue id 	 Returns the minimum plot range value of the function with the ID id. If the function not exists or if the minimum value is not defined, an empty string is returned.
/parser org.kde.kmplot.Parser.functionMaxValue id 	 Returns the maximum plot range value of the function with the ID id. If the function not exists or if the maximum value is not defined, an empty string is returned.
/parser org.kde.kmplot.Parser.setFunctionMinValue id min 	 Sets the minimum plot range value of the function with the ID id to min. True is returned if the function exists and the expression is valid, otherwise false.
/parser org.kde.kmplot.Parser.setFunctionMaxValue id max 	 Sets the maximum plot range value of the function with the ID id to max. True is returned if the function exists and the expression is valid, otherwise false.
/parser org.kde.kmplot.Parser.functionStartXValue id 	 Returns the initial x point for the integral of the function with the ID id. If the function not exists or if the x-point-expression is not defined, an empty string is returned.
/parser org.kde.kmplot.Parser.functionStartYValue id 	 Returns the initial y point for the integral of the function with the ID id. If the function not exists or if the y-point-expression is not defined, an empty string is returned.
/parser org.kde.kmplot.Parser.setFunctionStartValue id x y 	 Sets the initial x and y point for the integral of the function with the ID id to x and y. True is returned if the function exists and the expression is valid, otherwise false.
/view org.kde.kmplot.View.stopDrawing 	 If currently is drawing a function, the procedure will stop.
/view org.kde.kmplot.View.drawPlot 	 Redraws all functions.