HP 50g Graphing, 48gII Graphing manual Exited, D4 Reserved Variables

You can specify menu labels and key actions independently by replacing a single object within the custommenu list with a list of the form {“labelobject ” actionobject }.

To provide different shifted actions for custom menu keys, actionobject can be a list containing three action objects in this order:

The unshifted action (required if you want to specify the shifted actions). The leftshifted action.

The rightshifted action.

EQ

EQ contains the current equation or the name of the variable containing the current equation,

EQ supplies the equation for ROOT, as well as for the plotting command DRAW. (ΣDAT supplies the information when the plot type is HISTOGRAM, BAR, or SCATTER.)

The object in EQ can be an algebraic object, a number, a name, or a program. How DRAW interprets EQ depends on the plot type.

For graphics use, EQ can also be a list of equations or other objects. If EQ contains a list, then DRAW treats each object in turn as the current equation, and plots them successively. However, ROOT in the HP Solve application cannot solve an EQ containing al list.

To alter the contents of EQ, use the command STEQ.

EXITED

EXITED can be stored in any directory. If there is an EXITED program that exists in the path, it will be called upon exiting the command line. This can be used in conjunction with STARTED, for instance, to set a header size of 0 when entering the command line and restore it to 2 when exiting (in order to increase the editor window size). Note, this is only valid when entering the command line through a EDIT function.

EXPR

EXPR contains the current algebraic expression (or the name of the variable containing the current expression) used by the SYMBOLIC application and its associated commands. The object in EQ must be an algebraic or a name.

IOPAR

IOPAR is a variable in the HOME directory that contains a list of the I/O parameters needed for a communications link with a computer. It is created the first time you transfer data or open the serial port (OPENIO), and is automatically updated whenever you change the I/O settings. All IOPAR parameters are integers.

D4 Reserved Variables