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README.01B
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README July 15, 1991
INSTALLING EPI INFO, VERSION 5.01b
(This material also appears in the primary README file. It is duplicated
here for the use of those receiving a partial disk set in upgrade from
5.01a to 5.01b.)
If you are upgrading Version 5.01a to Version 5.01b, only the
ENTER and ANALYSIS programs need to be installed. In the standard,
four-disk distribution system, they are on the second disk. Install
these programs as usual and allow them to overwrite those for Version
5.01b. Note that ENTER is located on the second disk in Version 5.01b
but on the first disk in Version 5.01a.
WHAT'S NEW IN EPI INFO, VERSION 5.01b?
Version 5.01b incorporates the following changes, in addition to the
features of Version 5.01a:
*ANALYSIS (dated 7-15-91) has 3 new operators:
TRUNC(x) produces the value of x with any fractional portion
truncated.
FRAC(x) produces the fractional portion of x.
ROUND(x) produces the value of x rounded to the nearest whole
number. (Rounding is away from 0 in case of ties: 1.5 is rounded
to 2.0, but -1.5 is rounded to -2.0.) Legal values for rounded x
are in the range -2,147,483,648 to +2,147,483,647. For x outside
that range, ROUND(x) produces the unrounded value of x.
*ANALYSIS' DIV operator has been limited to numbers in the range of
approximately -214,748 to +214,748. Attempts to use larger numbers, and
DIV operations which result in errors, are signaled as errors. In case
of error, the value produced is -10E6. (X DIV Y is considered to result
in an error if ((X / Y) - (X DIV Y) - FRAC(X / Y) > 10E-300).)
*A problem with display of deleted records in ENTER has been corrected.
This problem occurred only with records with length of exact multiples
of 78 bytes.
We are happy to note that most of the "bugs" reported by helpful users
were of the type only noticed in specialized applications by a few
users, and some only became evident on particular types of computers.
Please continue to report difficulties to the Epi Info User Hotline
(404)-728-0545, so that future versions can be even more useful.
Suggestions for future enhancements should be directed to Andrew G.
Dean, M.D., DSE, EPO, Mailstop G34, Centers for Disease Control,
Atlanta, GA 30333, telephone (404) 639-3048, FAX (404) 639-2408.