Special Named Categories

You may have noticed that when the program asks you for the first category name it also offers the choice:
I''ll ask you for some information about how to draw your sample
    Type @ to see information on special categories.
     What is the name of the most general category?
     Press return when you are done

The program only tells you about using the @ when it askes you to name the first category, but you can use this feature for any category.

Typing @ and then pressing return will give you access to a list of predefined named categories. These categories exist because they are common enough that saving the time of entering them is worthwhile. The category menu is:

Here are some pre-defined categories that might be useful to you
    Type the letter of the category you want or just press return
    	d -- Days of the week
    	m -- Months of the year
    	l -- Letters of the alphabet
    	h -- Hours of the day

Typing any of the four letters takes you to the specific menu for that category. Pressing return takes you out of special categories and back to describing a normal category. For example, choosing "d" for Days of the Week gives the following choices:
    You may choose from three lists of days or just press return
    a -- All of the week days in order Sun. to Sat.
    s -- Sunday excluded.  The other days run from Mon. to Sat.
    w -- Working days.  Mon. to Fri.

Months of the year gives the choice of the entire year or only the school year portion. Letters of the alphabet gives the choice of upper or lower case. Hours of the day lets you choose a start time and an end time.

There may be times when you are frustrated by the special categories -- for example if you wanted to pick only weekend days, Sat. and Sun. or if you wanted your times to run from 7am to 9am and then from 4pm to 6pm. Remember that special categories exist only to make the description of common categories easier. You always have the option of creating your own categories by the normal category building method described above.


this page is at http://testbed.cis.drexel.edu/sample/special.html