FIX display on business vs. scientific Message #5 Posted by Karl Schneider on 14 Oct 2006, 3:51 p.m., in response to message #4 by Kalevipoeg
Kalevipoeg posted,
Quote:
I have compared f [n] of the 12C and fix [n] of the 11C.
For example we have a number 0.0012345
f [2] of the 12C gives 0.001
whereas
f fix [2] of the 11C gives 1.23x10^3
f [0], f [1], f [2], and f [3] all display 0.0012345 as 0.001 on the HP12C, as do the HP10B, HP14B, HP17B, and HP17BII. In effect, 0.001 is a "FIX 3" format.
That's a nice bit of insight into design principles of HP's business and scientificcalculator models: The business calculators offer a limited choice of selectable display formats:
 The HP12C offers FIX [0][9] and SCI [6] (limits of 10digit display)
 The HP10B offers FIX [0][9].
 The HP14B, HP17B, and HP17BII offer FIX [0][11] and ALL.
Of course, if the magnitude of a number is outside the range of the display using a FIX format, scientific notation with a base10 exponent will be utilized. For numbers of small nonzero magnitude, these models will simply extend a FIX display format with more decimal digits as needed until the number can be displayed as a nonzero value.
The scientific models, by contrast, offer selectable scientific notation with a designated number of decimal digits  SCI [n] and ENG [n], n = 09 or 011, as appropriate. So, they will revert to scientific notation with the same number [n] of decimal digits, if FIX [n] cannot represent a nonzero value using only [n] decimal digits.
So, why don't the HP businesscalculator models use the procedure of the HP scientificcalculator models? Because to do so would often invoke a nonselectable display mode, and that scientific notation is generally avoided in business applications unless absolutely necessary.
There you have it. BTW, I prefer the procedure of the scientific models, but one should recognize that it is based on their builtin capabilities.
 KS
Edited: 14 Oct 2006, 9:49 p.m.
