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calc: Invocation Macros

 
 18.3 Invocation Macros
 ======================
 
 Calc provides one special keyboard macro, called up by ‘C-x * z’
 (‘calc-user-invocation’), that is intended to allow you to define your
 own special way of starting Calc.  To define this “invocation macro,”
 create the macro in the usual way with ‘C-x (’ and ‘C-x )’, then type ‘Z
 I’ (‘calc-user-define-invocation’).  There is only one invocation macro,
 so you don’t need to type any additional letters after ‘Z I’.  From now
 on, you can type ‘C-x * z’ at any time to execute your invocation macro.
 
    For example, suppose you find yourself often grabbing rectangles of
 numbers into Calc and multiplying their columns.  You can do this by
 typing ‘C-x * r’ to grab, and ‘V R : *’ to multiply columns.  To make
 this into an invocation macro, just type ‘C-x ( C-x * r V R : * C-x )’,
 then ‘Z I’.  Then, to multiply a rectangle of data, just mark the data
 in its buffer in the usual way and type ‘C-x * z’.
 
    Invocation macros are treated like regular Emacs keyboard macros; all
 the special features described above for ‘Z K’-style macros do not
 apply.  ‘C-x * z’ is just like ‘C-x e’, except that it uses the macro
 that was last stored by ‘Z I’.  (In fact, the macro does not even have
 to have anything to do with Calc!)
 
    The ‘m m’ command saves the last invocation macro defined by ‘Z I’
 along with all the other Calc mode settings.  General Mode
 Commands.
 

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