The ``Keyboard'' Interface

  The ``Keyboard'' Interface was the original user interface for FIT2D and is still preferred by some experienced users. The GUI is almost certainly the easier way for newcomers to learn to use FIT2D, but an experienced user can often enter commands more quickly at the keyboard than by moving a mouse around. Thus, most of the functionality of FIT2D is available through the command interface. Some functionality such as the calibration menu is still only available through the keyboard menu at present, but gradually all commonly used functionality will be made available within the GUI.

Contrary to the GUI, the output of many commands is often in the memory. Where an operation can work on a simple pixel by pixel basis, the output is in the current data array, but for operations where one pixel may affect several pixels in the result, the output is in the memory. The Reference Manual (Hammersley, 1995) contains tables of the commands showing where any output appears.

About 120 commands are available in the main keyboard menu allowing more data analysis operations and further graphical output style control than presently available in the GUI. Additionally, the CALIBRATION command enters a sub-menu of commands specialising in detector distortion calibration, and the FIT command enters a sub-menu of commands for 2-D model fitting.